Dhall is a programmable configuration language that is not Turing-complete You can think of Dhall as: JSON + functions + types + imports

(from https://github.com/dhall-lang/dhall-lang)

Dhall is a relatively new configuration language written in haskell and its goals and features marry very well with langs like haskell/eta. Its main advantage over yaml f.e. is that dhall is typed and is guaranteed to terminate so you can make your config more discoverable and safe.

• you can use it to configure programs written in other language: haskell, scala or rust
  • maybe the next can be java or groovy!
• It can be compiled to other config formats likejson, yaml, bash, nix or cabal
  • maybe the next could be gradle

Its main drawbacks are:

• it has a lot of dependencies
• maybe it is too much powerful (functions and imports) for simple configurations

The goal of this issue is track the progress and possible problems of the use of dhall ant its tools:

• [X] compilation of dhall-haskell with eta
• [X] execution with eta of all core program subcommands (dhall, dhall repl, dhal format, dhall hash, ...)
  • Tested repl, format, hash and lint
• [X] execution with etlas of its tools:
  • [X] dhall-json: it needed a patch
  • [X] dhall-text,
  • [X] dhall-to-cabal
  • [dhall-nix] (https://github.com/dhall-lang/dhall-nix)
• test performance: we will open a new one if needed
• [X] use dhall-to-etlas to make etlas use dhall as its default configuration input.
  • In progress, tracked in this one: https://github.com/typelead/etlas/issues/66
• [X] create a library to expose the dhall api and make easy the interop with java client code

I am trying to bootstrap eta on Windows and stack exec eta-build install fails with

Configuring ghc-prim-0.4.0.0...
# epm (for install)
Building ghc-prim-0.4.0.0...
Preprocessing library ghc-prim-0.4.0.0...
eta.exe: could not execute: C:\Users\abiehl\AppData\Roaming\eta/../mingw/bin/gcc.exe
Error when running Shake build system:
* install
user error (Development.Shake.cmd, system command failed
Command: epm build
Current directory: C:\Users\abiehl\git\eta\libraries\ghc-prim
Exit code: 1
Stderr:
eta.exe: could not execute: C:\Users\abiehl\AppData\Roaming\eta/../mingw/bin/gcc.exe
)

Somehow it thinks a gcc is at C:\Users\abiehl\AppData\Roaming\eta/../mingw/bin/gcc.exe which is of course not right! (a good gcc is on path through stack exec).

Trying to manually build ghc-prim with stack exec -- epm build --eta-options=" -v4 -pgmP C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin\gcc"

Building ghc-prim-0.4.0.0...
Preprocessing library ghc-prim-0.4.0.0...
The ETA programming language compiler, Version 0.0.1 booted by GHC version 7.10.3
wired-in package ghc-prim not found.
wired-in package integer not found.
wired-in package base not found.
wired-in package rts mapped to rts-0.1.0.0-dd60ce55e5e6e7d613c6ae1fe388a75d
wired-in package template-haskell not found.
wired-in package ghc not found.
wired-in package dph-seq not found.
wired-in package dph-par not found.
E   rts-0.1.0.0-dd60ce55e5e6e7d613c6ae1fe388a75d
Hsc static flags:
wired-in package ghc-prim not found.
wired-in package integer not found.
wired-in package base not found.
wired-in package rts mapped to rts-0.1.0.0-dd60ce55e5e6e7d613c6ae1fe388a75d
wired-in package template-haskell not found.
wired-in package ghc not found.
wired-in package dph-seq not found.
wired-in package dph-par not found.
*** Chasing dependencies:
Chasing modules from: *GHC.CString,*GHC.Classes,*GHC.Magic,*GHC.Tuple,*GHC.Types,*GHC.JArray
Running the pipeline
Running phase Cpp HsSrcFile
Running phase HsPp HsSrcFile
Running the pipeline
Running phase Cpp HsSrcFile
Running phase HsPp HsSrcFile
Running the pipeline
Running phase Cpp HsSrcFile
Running phase HsPp HsSrcFile
Running the pipeline
Running phase Cpp HsSrcFile
Running phase HsPp HsSrcFile
Running the pipeline
Running phase Cpp HsSrcFile
Running phase HsPp HsSrcFile
Running the pipeline
Running phase Cpp HsSrcFile
Created temporary directory: C:\Temp\ghc13676_0
*** C pre-processor:
"C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin\gcc" "-include" "dist\build\autogen\cabal_macros.h" "-v" "-I" "dist\build" "-I" "dist\build" "-I" "dist\build\autogen" "-I" "dist\build" "-D__GLASGOW_HASKELL__=710" "-D__ETA_VERSION__=000"
"-include" "C:\Users\abiehl\AppData\Roaming\eta\include\ghcversion.h" "-D__GLASGOW_HASKELL_TH__=NO" "-D__SSE__=1" "-D__SSE2__=1" "-x" "assembler-with-cpp" ".\GHC\JArray.hs" "-o" "C:\Temp\ghc13676_0\ghc_1.hscpp"
Using built-in specs.
COLLECT_GCC=C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin/realgcc.exe
COLLECT_LTO_WRAPPER=C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../gcc-5.2.0/configure --prefix=/mingw64 --with-local-prefix=/mingw64/local --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --target=x86_64-w64-mingw32 --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include --libexecdir=/mingw64/lib --w
ith-gxx-include-dir=/mingw64/include/c++/5.2.0 --enable-bootstrap --with-arch=x86-64 --with-tune=generic --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada --enable-shared --enable-static --enable-libatomic --enable-threads=posix --enable-graphite --enable-fully-dynam
ic-string --enable-libstdcxx-time=yes --disable-libstdcxx-pch --disable-libstdcxx-debug --enable-version-specific-runtime-libs --disable-isl-version-check --enable-lto --enable-libgomp --disable-multilib --enable-checking=release --disable-rpath --disable-win32-registry
--disable-nls --disable-werror --disable-symvers --with-libiconv --with-system-zlib --with-gmp=/mingw64 --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 --with-pkgversion='Rev3, Built by MSYS2 project' --with-bugurl=http://sourceforge.net/projects/msys2 --wit
h-gnu-as --with-gnu-ld
Thread model: posix
gcc version 5.2.0 (Rev3, Built by MSYS2 project)
COLLECT_GCC_OPTIONS='-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin/../lib' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\gh
c-7.10.3\mingw\bin/../lib/gcc/x86_64-w64-mingw32/5.2.0' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin/../libexec/gcc/x86_64-w64-mingw32/5.2.0' '-include' 'dist\build\autogen\cabal_macros.h' '-v' '-I' 'dist\build' '-I' 'dist\build'
 '-I' 'dist\build\autogen' '-I' 'dist\build' '-D' '__GLASGOW_HASKELL__=710' '-D' '__ETA_VERSION__=000' '-include' 'C:\Users\abiehl\AppData\Roaming\eta\include\ghcversion.h' '-D' '__GLASGOW_HASKELL_TH__=NO' '-D' '__SSE__=1' '-D' '__SSE2__=1' '-o' 'C:\Temp\ghc13676_0\ghc_1
.hscpp' '-mtune=generic' '-march=x86-64'
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/cc1.exe -E -lang-asm -quiet -v -I dist\build -I dist\build -I dist\build\autogen -I dist\build -iprefix C:/Users/abiehl/AppData/Local/Programs/stack/x86_
64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/ -isystem C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include -isystem C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows
/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include-fixed -D_REENTRANT -D __GLASGOW_HASKELL__=710 -D __ETA_VERSION__=000 -D __GLASGOW_HASKELL_TH__=NO -D __SSE__=1 -D __SSE2__=1 -include dist\build\autogen\cabal_macros.h -include C:\Users\abiehl\AppData\Roam
ing\eta\include\ghcversion.h .\GHC\JArray.hs -mtune=generic -march=x86-64 -fno-directives-only -o C:\Temp\ccGrlwBj.s
ignoring duplicate directory "C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include"
ignoring duplicate directory "C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include-fixed"
ignoring duplicate directory "C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.2.0/include"
ignoring nonexistent directory "D:/develop/msys64/mingw64/include"
ignoring nonexistent directory "/mingw64/include"
ignoring duplicate directory "C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.2.0/include-fixed"
ignoring duplicate directory "C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "D:/develop/msys64/mingw64/x86_64-w64-mingw32/include"
ignoring duplicate directory "dist\build"
ignoring duplicate directory "dist\build"
#include "..." search starts here:
#include <...> search starts here:
 dist\build
 dist\build\autogen
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/include-fixed
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../include
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/../lib/gcc/x86_64-w64-mingw32/5.2.0/../../../../x86_64-w64-mingw32/include
End of search list.
COLLECT_GCC_OPTIONS='-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin/../lib' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\gh
c-7.10.3\mingw\bin/../lib/gcc/x86_64-w64-mingw32/5.2.0' '-B' 'C:\Users\abiehl\AppData\Local\Programs\stack\x86_64-windows\ghc-7.10.3\mingw\bin/../libexec/gcc/x86_64-w64-mingw32/5.2.0' '-include' 'dist\build\autogen\cabal_macros.h' '-v' '-I' 'dist\build' '-I' 'dist\build'
 '-I' 'dist\build\autogen' '-I' 'dist\build' '-D' '__GLASGOW_HASKELL__=710' '-D' '__ETA_VERSION__=000' '-include' 'C:\Users\abiehl\AppData\Roaming\eta\include\ghcversion.h' '-D' '__GLASGOW_HASKELL_TH__=NO' '-D' '__SSE__=1' '-D' '__SSE2__=1' '-o' 'C:\Temp\ghc13676_0\ghc_1
.hscpp' '-mtune=generic' '-march=x86-64'
 C:/Users/abiehl/AppData/Local/Programs/stack/x86_64-windows/ghc-7.10.3/mingw/bin/as.exe -v -I dist\build -I dist\build -I dist\build\autogen -I dist\build -o C:\Temp\ccopr6Jw.o C:\Temp\ccGrlwBj.s
GNU assembler version 2.25.1 (x86_64-w64-mingw32) using BFD version (GNU Binutils) 2.25.1
.\GHC\JArray.hs: Assembler messages:

GHC\JArray.hs:1:0:
     Error: junk at end of line, first unrecognized character is `{'

GHC\JArray.hs:2:0:
     Error: no such instruction: `ghcforeignimportprim '

GHC\JArray.hs:3:0:
     Error: junk at end of line, first unrecognized character is `{'

GHC\JArray.hs:4:0:  Error: no such instruction: `module GHC.JArray'

GHC\JArray.hs:5:0:
     Error: junk at end of line, first unrecognized character is `('

GHC\JArray.hs:6:0:  Error: no such instruction: `jshortarray'

GHC\JArray.hs:7:0:  Error: no such instruction: `jchararray'

GHC\JArray.hs:8:0:  Error: no such instruction: `intarray'

GHC\JArray.hs:9:0:  Error: no such instruction: `jlongarray'

GHC\JArray.hs:10:0:  Error: no such instruction: `floatarray'

GHC\JArray.hs:11:0:  Error: no such instruction: `doublearray'

GHC\JArray.hs:12:0:  Error: no such instruction: `objectarray'

GHC\JArray.hs:13:0:  Error: no such instruction: `objectarrayat'

GHC\JArray.hs:14:0:  Error: no such instruction: `objectarrayset'

GHC\JArray.hs:15:0:
     Error: junk at end of line, first unrecognized character is `)'

GHC\JArray.hs:17:0:  Error: no such instruction: `import GHC.Prim'

GHC\JArray.hs:18:0:  Error: no such instruction: `import GHC.Types'

GHC\JArray.hs:20:0:  Error: no such instruction: `type JByteArray'

GHC\JArray.hs:21:0:  Error: no such instruction: `type JShortArray'

GHC\JArray.hs:22:0:  Error: no such instruction: `type JCharArray'

GHC\JArray.hs:23:0:  Error: no such instruction: `type IntArray'

GHC\JArray.hs:24:0:  Error: no such instruction: `type JLongArray'

GHC\JArray.hs:25:0:  Error: no such instruction: `type FloatArray'

GHC\JArray.hs:26:0:  Error: no such instruction: `type DoubleArray'

GHC\JArray.hs:27:0:  Error: no such instruction: `type ObjectArray'
*** Deleting temp files:
Deleting: C:\Temp\ghc13676_0\ghc_1.hscpp
Warning: deleting non-existent C:\Temp\ghc13676_0\ghc_1.hscpp
*** Deleting temp dirs:
Deleting: C:\Temp\ghc13676_0

Well it does find gcc now but it tries to assemble JArray.hs as is which is of course wrong.

How can I install eta and co on Windows?

@jarekratajski reported this:

fibbtcoinner 0 sum presum  = sum
fibbtcoinner n sum presum = fibbtcoinner  (n-1) (sum + presum) sum

fibbtco n = fibbtcoinner n 1 0

fibbnaive  0 = 1
fibbnaive  1 = 1
fibbnaive  n = fibbnaive ( n-1) + fibbnaive ( n - 2)

main = do
        putStrLn $ show $ fibbtco <$> arr
        putStrLn $ show $ fibbnaive <$> arr
        where
arr = [0..10]

produces

[1,1,2,4,8,16,32,64,128,256,512]
[1,1,2,3,5,8,13,21,34,55,89]

when it should produce:

[1,1,2,3,5,8,13,21,34,55,89]
[1,1,2,3,5,8,13,21,34,55,89]

Reproduced on v0.7.

Hi I want to use the Scotty module 0.11.0 and has as dependency unix-2.7.2.2 which seems is not working properly with eta version 0.8.0b2

The error code says

Building unix-2.7.2.2 (lib)...

> Task :installDependenciesEta FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':installDependenciesEta'.
> [/.gradle/caches/etlas/1.4.0.0/etlas, --select-eta=0.8.0b2, deps, lib:eta-init] failed with ExitCode 1

Any idea how to fix this?

I am reporting this here because it seems like some of the things I am seeing are probably not wai specific. Sorry for the length of this ticket, it tires to document various issues I encountered when several requests are executed concurrently/very close to each other by wai Jetty server.

I have a project using servant that now has been converted to eta: https://github.com/rpeszek/crud-ex-backend-servant/tree/eta-jetty (eta-jetty branch) It uses Raw WAI logic to serve static files, and I see somewhat different errors with 'true' servant endpoints like endpoints serving JSON.

Right after etlas run if I first issue a single GET request like: http://localhost:9000/static/css/pure.css everything works fine. The first request takes some time to complete (warmup time typical of Java apps) but after that everything works and seems fast.

If right after starting the app I point my browser at: http://localhost:9000/elm# (which returns a full page) browser issues 4 GET request one for the page which completes and 3 for CSS and JS file which never complete (none of the 3 completes). It looks like a deadlock. If that happens, nothing works until the app is restarted and I issue a simple isolated 'warm-up' request. No errors are printed in the console.

To troubleshoot I added some putStrLn "hello" lines (at the beginning of WAI.Application handler) to see if the line gets hit. Weirdly enough, with that change I get errors printed

2017-09-17 18:40:09.996:WARN:oejs.HttpChannel:qtp1468343491-15: /static/css/pure.css
eta.runtime.exception.EtaException: thread blocked indefinitely in an MVar operation
	at resourcet.control.monad.trans.Resource$sat_s1FFQ.enter(Resource.hs:189)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at eta.runtime.exception.Exception.catch_(Exception.java:174)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
Caused by: 
eta.runtime.exception.EtaException: thread blocked indefinitely in an MVar operation
	at eta.runtime.stg.Capability.detectMVarDeadlock(Capability.java:523)
	at eta.runtime.stg.Capability.idleLoop(Capability.java:516)
	at eta.runtime.stg.Capability.blockedLoop(Capability.java:534)
	at eta.runtime.stg.Capability.blockedLoop(Capability.java:530)
	at eta.runtime.concurrent.Concurrent.takeMVar(Concurrent.java:63)
	at base.ghc.io.handle.Internals$$wa2.enter(Internals.hs:163)
	at base.ghc.io.handle.Internals$a3_sG1VB.enter(Internals.hs:132)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at base.ghc.io.handle.Internals$withHandlezq1.enter(Internals.hs:130)
	at base.ghc.io.handle.Internals$wantWritableHandle2.enter(Internals.hs:236)
	at base.ghc.io.handle.Internals$wantWritableHandle1.enter(Internals.hs:226)
	at base.ghc.io.handle.Text$hPutStr2.enter(Text.hs:544)
	at crud_ex_backend_servant.util.WaiStatic$$wa1.enter(WaiStatic.hs:30)
	at crud_ex_backend_servant.util.StaticFiles$sat_s1HO6.enter(StaticFiles.hs:29)
	at eta.runtime.apply.Function.applyPPV(Function.java:164)
	at servant_server.servant.server.Internal$sat_s42PO.enter(Internal.hs:441)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:91)
	at resourcet.control.monad.trans.Resource$sat_s1FFK.enter(Resource.hs)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.catch_(Exception.java:136)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
2017-09-17 18:40:09.997:WARN:oejs.HttpChannel:qtp1468343491-11: /static/css/styles.css
eta.runtime.exception.EtaException: Exception was thrown in rendering exception of type class java.lang.NullPointerException
	at resourcet.control.monad.trans.Resource$sat_s1FFQ.enter(Resource.hs:189)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at eta.runtime.exception.Exception.catch_(Exception.java:174)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
Caused by: 
eta.runtime.exception.EtaException: thread blocked indefinitely in an MVar operation
	at eta.runtime.stg.Capability.detectMVarDeadlock(Capability.java:523)
	at eta.runtime.stg.Capability.idleLoop(Capability.java:516)
	at eta.runtime.stg.Capability.blockedLoop(Capability.java:534)
	at eta.runtime.stg.Capability.blockedLoop(Capability.java:530)
	at eta.runtime.concurrent.Concurrent.takeMVar(Concurrent.java:63)
	at base.ghc.io.handle.Internals$$wa2.enter(Internals.hs:163)
	at base.ghc.io.handle.Internals$a3_sG1VB.enter(Internals.hs:132)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at base.ghc.io.handle.Internals$withHandlezq1.enter(Internals.hs:130)
	at base.ghc.io.handle.Internals$wantWritableHandle2.enter(Internals.hs:236)
	at base.ghc.io.handle.Internals$wantWritableHandle1.enter(Internals.hs:226)
	at base.ghc.io.handle.Text$hPutStr2.enter(Text.hs:544)
	at crud_ex_backend_servant.util.WaiStatic$$wa1.enter(WaiStatic.hs:30)
	at crud_ex_backend_servant.util.StaticFiles$sat_s1HO6.enter(StaticFiles.hs:29)
	at eta.runtime.apply.Function.applyPPV(Function.java:164)
	at servant_server.servant.server.Internal$sat_s42PO.enter(Internal.hs:441)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:91)
	at resourcet.control.monad.trans.Resource$sat_s1FFK.enter(Resource.hs)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.catch_(Exception.java:136)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)

(here pure.css returned 500 and remaining 2 never returned). I see no errors if putStrLn is removed or if requests are run in isolation. I see the printouts with or without warmup (with warmup fewer printouts and more intermittent). If requests are run in isolation everything works. However once the errors are encountered server stops responding and printing anything. suggesting that serving threads are dead.

MemoryManager: Adding putStrLn to a JSON handler (true Servant endpoint) produces another strange behavior. No error are printed in JSON request is executed in isolation. However if it is accompanied with other requests (like CSS files, etc) I get this error:

2017-09-17 16:12:02.603:WARN:oejs.HttpChannel:qtp1468343491-16: /things
eta.runtime.exception.EtaException: JException java.lang.IllegalStateException: The block that corresponds to the address 1048587 is not allocated in memory
	at resourcet.control.monad.trans.Resource$sat_s1FFQ.enter(Resource.hs:189)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at eta.runtime.exception.Exception.catch_(Exception.java:174)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
Caused by:
java.lang.IllegalStateException: The block that corresponds to the address 1048587 is not allocated in memory
	at eta.runtime.io.MemoryManager.getBoundedBuffer(MemoryManager.java:615)
	at eta.bytestring.Utils.memcmp(Utils.java:46)
	at bytestring.data.bytestring.Internal$$wcompareBytes.enter(Internal.hs:594)
	at http_media.network.http.media.mediatype.Internal$$w$cparseAccept.enter(Internal.hs:47)
	at http_media.network.http.Media$mapAcceptMedia_go.enter(Media.hs:235)
	at http_media.network.http.Media$$w$sparseQuality.enter(Media.hs:232)
	at crud_ex_backend_servant.crudex.Server$$Lr2SVZZ$wlvl18.enter(Server.hs)
	at crud_ex_backend_servant.crudex.Server$$Lr2SW0lvl49.enter(Server.hs)
	at eta.runtime.apply.Function.applyPPP(Function.java:190)
	at servant_server.servant.server.Internal$sat_s40K8.enter(Internal.hs:220)
	at eta.runtime.apply.Function.applyP(Function.java:102)
	at servant_server.servant.server.internal.RoutingApplication$sat_s1X8U.enter(RoutingApplication.hs:379)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:91)
	at resourcet.control.monad.trans.Resource$sat_s1FFK.enter(Resource.hs)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.catch_(Exception.java:136)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)

I sometimes see this super puzzling error that does not even have any of my code in the stack trace:

2017-09-17 13:41:33.517:WARN:oejs.HttpChannel:qtp2114537280-11: /things
eta.runtime.exception.EtaException: JException java.nio.BufferUnderflowException
	at resourcet.control.monad.trans.Resource$sat_s1FFQ.enter(Resource.hs:189)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at eta.runtime.exception.Exception.catch_(Exception.java:174)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
Caused by:
java.nio.BufferUnderflowException
	at java.nio.Buffer.nextGetIndex(Buffer.java:500)
	at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:249)
	at eta.bytestring.Utils.memcmp(Utils.java:50)
	at bytestring.data.bytestring.Internal$$wcompareBytes.enter(Internal.hs:594)
	at http_media.network.http.media.mediatype.Internal$$w$cparseAccept.enter(Internal.hs:47)
	at http_media.network.http.Media$mapAcceptMedia_go.enter(Media.hs:235)
	at http_media.network.http.Media$$w$sparseQuality.enter(Media.hs:232)
	at servant_server.servant.server.Internal$v_s40IY.thunkEnter(Internal.hs:205)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at eta.runtime.thunk.Thunk.applyP(Thunk.java:151)
	at servant_server.servant.server.Internal$eta1_s40JA.thunkEnter(Internal.hs)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at eta.runtime.thunk.Thunk.applyP(Thunk.java:151)
	at servant_server.servant.server.Internal$sat_s40JM.thunkEnter(Internal.hs)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.apply.Function.applyPV(Function.java:117)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.apply.Function.applyPV(Function.java:117)
	at eta.runtime.apply.Function.applyPPV(Function.java:156)
	at servant_server.servant.server.internal.RoutingApplication$sat_s1X7V.enter(RoutingApplication.hs:215)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyPV(PAP.java:142)
	at eta.runtime.thunk.Thunk.applyPV(Thunk.java:156)
	at servant_server.servant.server.internal.RoutingApplication$sat_s1X8U.enter(RoutingApplication.hs:370)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:91)
	at resourcet.control.monad.trans.Resource$sat_s1FFK.enter(Resource.hs)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.catch_(Exception.java:136)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:199)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)

Is putStrLn not safe to use here? I modified https://github.com/rahulmutt/eta-servant-example code like so:

        hello :: Maybe String -> Handler HelloMessage
        hello mname = do
          _ <- liftIO $ putStrLn "Hello"
          return . HelloMessage $ case mname of
             Nothing -> "Hello, anonymous coward"
             Just n  -> "Hello, " ++ n

By issuing 2 requests very close to each other right after app start: http://localhost:9000/invalid http://localhost:9000/hello

I can get this error:

2017-09-17 16:50:31.686:WARN:oejs.HttpChannel:qtp1987360300-10: /hello
eta.runtime.exception.RuntimeInternalError: |[Eta v0.0.9b1] ap_p|Please report this as a bug: https://github.com/typelead/eta/issues
	at eta.runtime.RuntimeLogging.barf(RuntimeLogging.java:15)
	at eta.runtime.stg.Closure.applyP(Closure.java:62)
	at eta.runtime.thunk.Thunk.applyP(Thunk.java:151)
	at main.Main$sat_s3EDC.thunkEnter(Main.hs)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at eta.runtime.thunk.Thunk.applyP(Thunk.java:151)
	at bytestring.data.bytestring.builder.Internal$sat_s490T.enter(Internal.hs:391)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.IO$unsafeDupablePerformIO.enter(IO.hs:182)
	at bytestring.data.bytestring.builder.Internal$toLazzyByteStringWith.enter(Internal.hs:248)
	at bytestring.data.bytestring.Builder$toLazzyByteString.enter(Builder.hs:281)
	at main.Main$$s$fAllCTRender_ZC_a_$s$fMimeRender_zt_JSON_a_$cmimeRender2.enter(Main.hs)
	at eta.runtime.apply.Function.applyPP(Function.java:139)
	at servant.servant.api.ContentTypes$bs_s1TVC.thunkEnter(ContentTypes.hs:277)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at servant_server.servant.server.Internal$sat_s40K5.thunkEnter(Internal.hs:189)
	at eta.runtime.thunk.UpdatableThunk.enter(UpdatableThunk.java:18)
	at eta.runtime.stg.Closure.evaluate(Closure.java:24)
	at wai.network.Wai$responseLBS1.enter(Wai.hs)
	at servant_server.servant.server.Internal$sat_s40K6.enter(Internal.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyPV(PAP.java:142)
	at blaze_builder.blaze.bytestring.Builder$$wa2_s1GQB.enter(Builder.hs)
	at blaze_builder.blaze.bytestring.Builder$sat_s1GUH.enter(Builder.hs:246)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.IO$unsafeDupablePerformIO.enter(IO.hs:182)
	at blaze_builder.blaze.bytestring.Builder$$wtoLazzyByteStringWith.enter(Builder.hs:245)
	at wai_servlet.network.wai.servlet.Response$$wa.enter(Response.hs:61)
	at wai_servlet.network.wai.servlet.Response$updateHttpServletResponse1.enter(Response.hs)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFE.enter(Jetty.hs:46)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.apply.Function.applyPV(Function.java:117)
	at servant_server.servant.server.internal.RoutingApplication$sat_s1X8U.enter(RoutingApplication.hs:371)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.unmaskAsyncExceptions(Exception.java:91)
	at resourcet.control.monad.trans.Resource$sat_s1FFK.enter(Resource.hs)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at eta.runtime.exception.Exception.catch_(Exception.java:136)
	at resourcet.control.monad.trans.Resource$sat_s1FFR.enter(Resource.hs:188)
	at eta.runtime.apply.Function.applyV(Function.java:16)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at eta.runtime.exception.Exception.maskAsyncExceptions(Exception.java:42)
	at resourcet.control.monad.trans.Resource$sat_s1FG4.enter(Resource.hs:187)
	at eta.runtime.apply.Function.applyPV(Function.java:120)
	at base.ghc.Base$bindIO1.enter(Base.hs:1067)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at base.ghc.Base$bindIO1.enter(Base.hs:1021)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyV(PAP.java:41)
	at eta.runtime.thunk.Thunk.applyV(Thunk.java:121)
	at wai_servlet_handler_jetty.network.wai.servlet.handler.Jetty$sat_sRFP.enter(Jetty.hs:41)
	at eta.runtime.apply.Function.applyO(Function.java:87)
	at eta.runtime.thunk.Thunk.applyO(Thunk.java:146)
	at base.java.TopHandler$runJava1.enter(TopHandler.hs:25)
	at base.java.TopHandler$runJava.enter(TopHandler.hs)
	at eta.runtime.apply.PAP.apply(PAP.java:31)
	at eta.runtime.apply.PAP.applyO(PAP.java:111)
	at eta.runtime.stg.Closures$EvalJava.enter(Closures.java:149)
	at eta.runtime.stg.Capability.schedule(Capability.java:156)
	at eta.runtime.stg.Capability.scheduleClosure(Capability.java:101)
	at eta.runtime.Runtime.evalJava(Runtime.java:201)
	at eta.org.eclipse.jetty.server.handler.AbstractHandler$Eta.handle(Unknown Source)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:564)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:317)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:251)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:279)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:110)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:124)
	at org.eclipse.jetty.util.thread.Invocable.invokePreferred(Invocable.java:128)
	at org.eclipse.jetty.util.thread.Invocable$InvocableExecutor.invoke(Invocable.java:222)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:294)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.produce(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:672)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:590)
	at java.lang.Thread.run(Thread.java:745)
Hello

I had install eta 0.0.6b3

But can't run jar even in uberjar mode the error info is as blow.

I had try etlas run without uberjar-mode, the error info is the same.

$etlas clean
cleaning...
$ etlas configure --enable-uberjar-mode
Resolving dependencies...
Configuring eta-example-0.1.0.0...
zhangjuns-MacBook-Pro:eta-example zhangjun$ etlas build
Preprocessing executable 'eta-example' for eta-example-0.1.0.0..
Building executable 'eta-example' for eta-example-0.1.0.0..
[1 of 1] Compiling Main             ( src/Main.hs, dist/build/eta-example/eta-example-tmp/Main.jar )

src/Main.hs:10:1: Warning: Tab character

src/Main.hs:11:1: Warning: Tab character

src/Main.hs:12:1: Warning: Tab character

src/Main.hs:15:5: Warning: Tab character

src/Main.hs:16:5: Warning: Tab character

src/Main.hs:17:5: Warning: Tab character

src/Main.hs:18:5: Warning: Tab character

src/Main.hs:19:5: Warning: Tab character

src/Main.hs:26:1: Warning: Tab character
Linking dist/build/eta-example/eta-example.jar ...

$ java -jar ./dist/build/eta-example/eta-example.jar
Exception in thread "main" java.lang.NoClassDefFoundError: eta/base/Utils
	at base.system.Environment$getArgs1.enter(Unknown Source)
	at eta.runtime.apply.StgFun.apply(StgFun.java:19)
	at eta.runtime.apply.ApV.stackEnter(ApV.java:12)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:43)
	at eta.runtime.stg.StgContext.checkForStackFrames(StgContext.java:79)
	at base.ghc.Base$bindIO1.enter(Unknown Source)
	at eta.runtime.apply.Apply$PAPApply.enter(Apply.java:231)
	at eta.runtime.apply.StgPAP.apply(StgPAP.java:46)
	at eta.runtime.apply.ApV.stackEnter(ApV.java:12)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:43)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:26)
	at eta.runtime.stg.StackFrame.enter(StackFrame.java:26)
	at eta.runtime.stg.Capability.schedule(Capability.java:260)
	at eta.runtime.RtsScheduler.scheduleWaitThread(RtsScheduler.java:57)
	at eta.runtime.Rts.evalLazyIO(Rts.java:96)
	at eta.runtime.Rts.hsMain(Rts.java:38)
	at eta.main.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: eta.base.Utils
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 17 more

[1 of 5] Compiling GHC.Types ( GHC/Types.hs, dist/build/GHC/Types.jar ) eta: panic! (the 'impossible' happened) (Eta version 0.0.5): Parsing of archive structure failed: Cannot locate end of central directory in "/home/john/eta/eta/libraries/ghc-prim/dist/build/GHC/Types.jar"

Please report this as a Eta bug: http://github.org/typelead/eta/issues

Failed to install ghc-prim-0.4.0.0 epm: Error: some packages failed to install: ghc-prim-0.4.0.0 failed during the building phase. The exception was: ExitFailure 1 Error when running Shake build system:

• install user error (Development.Shake.cmd, system command failed Command: epm install --solver=topdown Current directory: /home/john/eta/eta/libraries/ghc-prim Exit code: 1 Stderr: eta: panic! (the 'impossible' happened) (Eta version 0.0.5): Parsing of archive structure failed: Cannot locate end of central directory in "/home/john/eta/eta/libraries/ghc-prim/dist/build/GHC/Types.jar"

Please report this as a Eta bug: http://github.org/typelead/eta/issues

epm: Error: some packages failed to install: ghc-prim-0.4.0.0 failed during the building phase. The exception was: ExitFailure 1 )

See https://github.com/rahulmutt/eta-bug for reproducing.

The error is:

[58 of 58] Compiling Development.Shake.Config ( src/Development/Shake/Config.hs, dist/build/Development/Shake/Config.jar )

<no location info>:
    eta: panic! (the 'impossible' happened)
  (Eta version 0.7.0b2):
	unequal assigmnents

Please report this as a Eta bug: http://github.com/typelead/eta/issues

@jarekratajski This panic is coming from your recent multiAssign changes.

The tail end of Config.dump-cg-trace:

...
Generating (mutually recursive) readConfigFile_go
StgCase wild_sF1XY Alg HashMap
StgApp ds_sF1XW []
cgIdApp: EnterIt
StgApp z1_sF1XV [eta_sF1XX]
cgIdApp: SlowCall
StgCase sat_sF1Y1 Prim Int#
StgOpApp sizeofSmallArray# [dt1_sF1Y0] Int#
StgApp $s$wgo2_rF1KD [dt1_sF1Y0, sat_sF1Y1, 0, z1_sF1XV, eta_sF1XX]
cgIdApp: JumpToIt

So that indicates the problem occurred when generating a call to $s$wgo2_rF1KD.

The context from Config.dump-stg:

...
        case ds_sF1XW of _ [Occ=Dead] {
          Data.HashMap.Base.Empty -> z1_sF1XV eta_sF1XX;
          Data.HashMap.Base.BitmapIndexed _ [Occ=Dead] dt1_sF1Y0 ->
              case sizeofSmallArray# [dt1_sF1Y0] of sat_sF1Y1 {
                __DEFAULT ->
                    $s$wgo2_rF1KD dt1_sF1Y0 sat_sF1Y1 0 z1_sF1XV eta_sF1XX;
              };
...

I wonder if there's some assumption we made about multi assignments that's getting invalidated here?

Description

dhall-eta tests reads lot of dhall files using Data.Text.IO.readFile and some of the calls throws java.nio.channels.ClosedByInterruptException

Expected Behavior

All files should be readed correctly

Actual Behavior

Some of the calls throws:

normalization/success/prelude/Natural/even/0A.dhall:          FAIL
      Exception: 
      ↳ ./../dhall-lang/Prelude/package.dhall
      JException java.nio.channels.ClosedByInterruptException

In windows i get occasionally

      Exception:
      ↳ ./../dhall-lang/Prelude/package.dhall
        ↳ ./../dhall-lang/Prelude/Integer/package.dhall
          ↳ ./../dhall-lang/Prelude/Integer/toDouble
      D:\ws\eta\dhall\dhall-eta\..\dhall-lang\Prelude\Integer\toDouble: openFile: resource busy (file is locked)

Possible Fix

Not sure where the bug can be fixed.. to investigate

Steps to Reproduce

1. Trigger a circleci test build for dhall-eta like https://circleci.com/gh/eta-lang/dhall-eta/13
2. Or checkout dhall-eta and run etlas test in local

Context

Setup test suite for dhall-eta

Your Environment

• circleci with eta master docker image
• local: windows with eta and etlas built from master
• Link to your project: https://github.com/eta-lang/dhall-eta

• In double-conversion-2.0.2.0 there is a module (Data.Double.Conversion.Text) with a cpp condition:

#if MIN_VERSION_base(4,4,0)
import Control.Monad.ST.Unsafe (unsafeIOToST)
#else
import Control.Monad.ST (unsafeIOToST)
#endif

• with etlas new-build it fails with:

Data\Double\Conversion\Text.hs:30:26:
    Module `Control.Monad.ST' does not export `unsafeIOToST'

• it seems the cpp condition is not working
• with etlas old-build it works

Minimum program to reproduce

etlas build this program as a uberjar.

module Main where

import           Data.Time.LocalTime

main :: IO ()
main = print =<< getZonedTime

The error message

$ etlas build
Resolving dependencies...
Configuring eta-time-error-0.1.0.0...
Preprocessing executable 'eta-time-error' for eta-time-error-0.1.0.0..
Building executable 'eta-time-error' for eta-time-error-0.1.0.0..
[1 of 1] Compiling Main             ( src\Main.hs, dist\build\eta-time-error\eta-time-error-tmp\Main.jar )
Linking dist\build\eta-time-error\eta-time-error.jar ...
$ java -jar dist\build\eta-time-error\eta-time-error.jar
Exception in thread "main" java.lang.NoClassDefFoundError: eta/time/Utils
        at time.data.time.localtime.internal.TimeZone$$wa.enter(TimeZone.hs:91)
        at time.data.time.localtime.internal.TimeZone$$wa1.apply2V(TimeZone.hs:99)
        at time.data.time.localtime.internal.ZonedTime$getZZonedTime1.applyV(ZonedTime.hs:52)
        at main.Main$main1.applyV(Main.hs:8)
        at main.Main$DZCmain.applyV(Main.hs)
        at eta.runtime.stg.Closures$EvalLazyIO.enter(Closures.java:104)
        at eta.runtime.stg.Capability.schedule(Capability.java:157)
        at eta.runtime.stg.Capability.scheduleClosure(Capability.java:102)
        at eta.runtime.Runtime.evalLazyIO(Runtime.java:189)
        at eta.runtime.Runtime.main(Runtime.java:182)
        at eta.main.main(Unknown Source)
Caused by: java.lang.ClassNotFoundException: eta.time.Utils
        at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
        at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
        ... 11 more

My environment

$ etlas exec eta -- --version
Compiler for the Eta Programming Language, version 0.0.9b6
$ etlas --version
etlas version 1.1.0.0
compiled using version 2.1.0.0 of the etlas-cabal library
$ java -version
java version "1.7.0_80"
Java(TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot(TM) 64-Bit Server VM (build 24.80-b11, mixed mode)

Description

This PR corrects misspellings identified by the check-spelling action.

The misspellings have been reported at https://github.com/jsoref/eta/commit/5a440c46768b4d4553dc2bfeffa329b2a7262fda#commitcomment-79875390

How Has This Been Tested?

The action reports that the changes in this PR would make it happy: https://github.com/jsoref/eta/commit/28d74f30e4030b2e82326c1962ea8d726c7aa294

Note: this PR does not include the action. If you're interested in running a spell check on every PR and push, that can be offered separately.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Documentation change
• [x] Test suite change

It's quite possible there are breaking changes. I fully expect this will need to be split or something. I'm very comfortable w/ working on large changesets. I just need direction about how each project prefers to address them.

Checklist:

• [ ] I have read the CONTRIBUTING document.

Description

Generally https urls should be preferred over http urls. Also, live urls should be preferred over dead ones.

Note that I tend to leave distinct changes as distinct commits as it makes it easier for me to drop things that groups don't like. I'm not attached to any of these individual changes, nor their structure. I'm happy to squash, although I prefer to do that after the changes are accepted (and I'm happier to let someone else squash and pick a commit message).

How Has This Been Tested?

I used a simple script that checked to see if it looked like pages were available via https:

check() { curl -I "$1"; curl -I "$(echo "$1" | perl -pe 's<http:><https:>')"; }

And had a handy script to update them if they did:

update() { rs "$1" "$(echo "$1" | perl -pe 's<http:><https:>')" "https"; }     

For a number of things that failed or provided redirects, I followed them.

Note that I left a handful of dead dangling links as http (and msys insists on using http, so...)

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [x] Documentation change
• [ ] Test suite change

Checklist:

• [x] I have read the CONTRIBUTING document.

I'm trying to get eta/etlas setup to compile a pretty straightforward cabal project to the jvm using eta on wsl, and it appears certain parts of the eta-lang website nescesary to get etlas to work are down.

Whenever I try to setup the eta-init project using gradle, I get `Execution failed for task ':setupEnvironmentEta'.

Failed to fetch file from url: http://cdnverify.eta-lang.org/eta-binaries/etlas-1.5.0.0/binaries/x86_64-linux/etlas`

Similarly, whenever I try to etlas update, I get: curl: (6) Could not resolve host: metrics.eta-lang.org

git clone https://github.com/typelead/eta-init

Task :setupEnvironmentEta FAILED FAILURE: Build failed with an exception.

• What went wrong: Execution failed for task ':setupEnvironmentEta'.

Unsupported OS 'FreeBSD'; install etlas manually and configure with etlasPath

Task :installDependenciesEta FAILED when building statistics-0.15.2.0 from Hackage

Description

When Eta tries to build and install the dependency, 'statistics:0.15.2.0', it suddenly went into panic while building the library for math-functions-0.3.3.0.

Eta then exited the build process with an exception.

Expected Behavior

Successful build and installation of the statistics-0.15.2.0 package.

Actual Behavior

The dependency build process failed at step 7 when building the library for math-functions-0.3.3.0.

The information provided by Eta is as follows:

[ 6 of 11] Compiling Numeric.Series
[ 7 of 11] Compiling Numeric.SpecFunctions.Compateta: panic! (the 'impossible' happened) (Eta version 0.8.6b5): tcCheckFIType: Unsupported calling convention. ccall unsafe "value erfc"

Please report this as a Eta bug: http://github.com/typelead/eta/issues

statistics-0.15.2.0). See the build log above for details.

Task :installDependenciesEta FAILED :installDependenciesEta (Thread[Task worker for ':',5,main]) completed. Took 3.536 secs.

FAILURE: Build failed with an exception.

Possible Fix

N.A.

Steps to Reproduce

1. Include 'statistics:0.15.2.0' as a dependency in the Gradle build config file.
2. Import Statistics.Distribution.Normal in Main.hs
3. Run gradlew

Context

Trying to import the library to use in my program.

Your Environment

• Did you install an older version of Eta/Etlas before? No
• Current Eta & Etlas version: Eta 0.8.6b5 & Etlas 1.5.0.0
• Operating System and version: Ubuntu 18.04.4 LTS / bionic
• Link to your project: N.A.

Based on the fact that there's not much commit/release activity in last half year, I'm wondering if this project is still alive, under development, or has it been abandonned?