GHC panic when building Stack on macOS Sierra

[bitemyapp]

GHC 7.10.3

stack upgrade --git

$ uname -a
Darwin cumae.local 16.0.0 Darwin Kernel Version 16.0.0: Tue Aug 23 17:02:44 PDT 2016; root:xnu-3789.1.31~2/RELEASE_X86_64 x86_64

Xcode 8.0 GM, macOS Sierra

Preprocessing library stack-1.2.1...
[ 1 of 96] Compiling Text.PrettyPrint.Leijen.Extended ( src/Text/PrettyPrint/Leijen/Extended.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Text/PrettyPrint/Leijen/Extended.o )
[ 2 of 96] Compiling Stack.Ghci.Script ( src/Stack/Ghci/Script.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Stack/Ghci/Script.o )
[ 3 of 96] Compiling Stack.FileWatch  ( src/Stack/FileWatch.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Stack/FileWatch.o )
[ 4 of 96] Compiling System.Process.PagerEditor ( src/System/Process/PagerEditor.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/System/Process/PagerEditor.o )
[ 5 of 96] Compiling System.Process.Log ( src/System/Process/Log.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/System/Process/Log.o )
[ 6 of 96] Compiling Paths_stack      ( .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_stack.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Paths_stack.o )
[ 7 of 96] Compiling Path.Find        ( src/Path/Find.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Path/Find.o )
[ 8 of 96] Compiling Path.Extra       ( src/Path/Extra.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Path/Extra.o )
[ 9 of 96] Compiling System.Process.Read ( src/System/Process/Read.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/System/Process/Read.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 7.10.3 for x86_64-apple-darwin):
        Loading temp shared object failed: dlopen(/var/folders/79/6lft40kj3cqb9f08_8yfg3vr0000gn/T/ghc29687_0/libghc_55.dylib, 5): no suitable image found.  Did find:
        /var/folders/79/6lft40kj3cqb9f08_8yfg3vr0000gn/T/ghc29687_0/libghc_55.dylib: malformed mach-o: load commands size (46680) > 32768

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

Completed 178 action(s).

--  While building package stack-1.2.1 using:
      /private/var/folders/79/6lft40kj3cqb9f08_8yfg3vr0000gn/T/stack-upgrade18342/stack/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/setup/setup --builddir=.stack-work/dist/x86_64-osx/Cabal-1.22.5.0 build lib:stack exe:stack --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1

[zmwangx]

I was able to reproduce both locally and on Homebrew's CI. (We use GHC 8.0.1.)

[zmwangx]

Maybe the title could be a little bit more informative. This is only a problem on macOS 10.12 Sierra as far as I can tell.

[ilovezfs]

Note also
https://ghc.haskell.org/trac/ghc/ticket/12198
https://ghc.haskell.org/trac/ghc/ticket/12479

[ilovezfs]

@cartazio any ideas how to fix the GHC problem with Sierra? macOS 10.12 has gone GM and Stack is dead in the water.

[cartazio]

Is it stack specific or ghc 8.0 generally? Is there a minimal repro?

[zmwangx]

Since @bitemyapp's top post reports this for GHC 7.10.3, I suppose it's not specific to GHC 8.0.

[cartazio]

It looks like it's related to split objects or sections?

It would help if there was a simpler application that reported this issue

[ilovezfs]

@cartazio there's doubt that it's about split-sections: https://ghc.haskell.org/trac/ghc/ticket/12479#comment:4

[ilovezfs]

@cartazio I think the minimal reproducer is brew instal -s stack at this point, but it looks like it really doesn't get very far

Building stack-1.1.2...
Preprocessing library stack-1.1.2...
[ 1 of 87] Compiling Stack.FileWatch  ( src/Stack/FileWatch.hs, dist/dist-sandbox-68bf8d9c/build/Stack/FileWatch.o )
[ 2 of 87] Compiling System.Process.PagerEditor ( src/System/Process/PagerEditor.hs, dist/dist-sandbox-68bf8d9c/build/System/Process/PagerEditor.o )
[ 3 of 87] Compiling System.Process.Log ( src/System/Process/Log.hs, dist/dist-sandbox-68bf8d9c/build/System/Process/Log.o )
[ 4 of 87] Compiling System.Process.Read ( src/System/Process/Read.hs, dist/dist-sandbox-68bf8d9c/build/System/Process/Read.o )
ghc: panic! (the 'impossible' happened)
  (GHC version 8.0.1 for x86_64-apple-darwin):
    Loading temp shared object failed: dlopen(/var/folders/4d/rttdp_9d2s7f36zplgwnqrgr0000gn/T/ghc94633_0/libghc_44.dylib, 5): no suitable image found.  Did find:
    /var/folders/4d/rttdp_9d2s7f36zplgwnqrgr0000gn/T/ghc94633_0/libghc_44.dylib: malformed mach-o: load commands size (40192) > 32768

[ilovezfs]

@borsboom any idea what the problem here is? The Sierra GM has escaped into the wild!

[cartazio]

minimal code reproducer, stack is too much code

[borsboom]

@ilovezfs No idea. It has to be a GHC bug (panics always are) but would be nice to find a workaround. I don't have an Apple developer account, so I don't have any access to Sierra betas. Once it's released I can upgrade my spare mac Mini and try to reproduce.

[zmwangx]

@borsboom The public beta is already on GM so you don't need to have a developer subscription to have access to pretty much the final version of 10.12.

[borsboom]

If anyone else has some time, I'd probably start trying to make a smaller reproduction by extracting the failing System.Process.Read module to a separate project and minimizing the dependencies. It's an isolated module so that should be pretty easy. If it still fails, just start taking out pieces of code until you find what triggers the panic (if it doesn't fail... well then it's more complicated I guess).