Building with GHCJS intermittently crashes

[3noch]

I'm building a project that uses GHCJS improved base and Reflex-DOM. However, intermittently, the build would fail with:

--  While building package http-types-0.8.6 using:
      /Users/elliot/.stack/setup-exe-cache/x86_64-osx/setup-Simple-Cabal-1.22.4.0-ghcjs-0.2.0_ghc-7.10.2 --builddir=.stack-work/dist/x86_64-osx/Cabal-1.22.4.0_ghcjs configure --with-ghcjs=/Users/elliot/.stack/programs/x86_64-osx/ghcjs-0.2.0.20160107_ghc-7.10.2/bin/ghcjs --with-ghcjs-pkg=/Users/elliot/.stack/programs/x86_64-osx/ghcjs-0.2.0.20160107_ghc-7.10.2/bin/ghcjs-pkg --user --package-db=clear --package-db=global --package-db=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/pkgdb --libdir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/lib --bindir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/bin --datadir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/share --libexecdir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/libexec --sysconfdir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/etc --docdir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/doc/http-types-0.8.6 --htmldir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/doc/http-types-0.8.6 --haddockdir=/Users/elliot/.stack/snapshots/x86_64-osx/lts-3.10/ghcjs-0.2.0_ghc-7.10.2/doc/http-types-0.8.6 --dependency=array=array-0.5.1.0-1b14ea9bda4435fa660b7cafe6707fb1 --dependency=base=base-4.8.0.0-a3a3ebe3085e9d11c37cceba58a4365f --dependency=blaze-builder=blaze-builder-0.4.0.1-aae1a4fc552cf015dda7e237bc69495d --dependency=bytestring=bytestring-0.10.6.0-5352fe91f9dde68208480250c39ad337 --dependency=case-insensitive=case-insensitive-1.2.0.4-d5842f851021a2824729738f97017002 --dependency=text=text-1.2.1.1-143e2b21f3b7f11ce926e3b74b97d235 --ghcjs
    Process exited with code: ExitFailure 1
    Logs have been written to: /Users/elliot/a/mine/haskapp/front/.stack-work/logs/http-types-0.8.6.log

    Configuring http-types-0.8.6...
    setup-Simple-Cabal-1.22.4.0-ghcjs-0.2.0_ghc-7.10.2: Pattern match failure in
    do expression at Distribution/Simple/GHCJS.hs:104:3-27

When I installed http-types by itself, it worked: stack install http-types-0.8.6

This looks like it could easily be an upstream bug, but I couldn't find it so I'm filing it here so it is at least visible.

[3noch]

$ stack --version
Version 1.0.1, Git revision b10bee1d0e49aa230e9929c3a9e797581b250ebe x86_64

[mgsloan]

Yikes, that's not very good error reporting.. Error is from https://github.com/haskell/cabal/blob/4f6e9a5b63640f4203560f3c7a89131fc66fdd7e/Cabal/Distribution/Simple/GHCJS.hs#L104 , I guess indicating that it couldn't find ghcjs-pkg, or couldn't get its version.

I'm betting this is related to #1496 / ghcjs/ghcjs#451 - pretty sure it's an upstream issue with ghcjs / cabal. I find it highly unlikely that such nondeterminism would come from stack, so closing this issue. I'm leaving open the other issue, since it seems to be the main place people are communicating about this issue. It's also possible that stack is doing something wrong that causes this, but since the same issue crops up when using cabal, I doubt it.

Out of curiosity, did you install GHCJS using stack?

[mgsloan]

Maybe it'd be good to open an issue with cabal, at least about that error reporting? Having pattern matching in a do that can fail is pretty bad..

[mgsloan]

I just figured out #1496 - it's due to node version. Things work for me with v0.10 . Does that also resolve this?

[3noch]

I wondered if it was node! I'll see what I find.

[geraldus]

I have this issue as well.

$ stack --version
Version 1.0.2 x86_64

$ node --version
v5.4.1

$ stack exec ghcjs -- --version
The Glorious Glasgow Haskell Compilation System for JavaScript, version 0.2.0.20151029 (GHC 7.10.2)

I'll try to downgrade node and see what will happen.

[geraldus]

I've upgraded node to v5.5.0, then removed contents of ~/.ghcjs and re-booted GHCJS again:

stack setup

After successful boot I was able to build my project.