#6025: GHC Panic On Recompile
---------------------------------+------------------------------------------
Reporter: scooty-puff | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 7.4.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: Compile-time crash
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
---------------------------------+------------------------------------------
Changes (by simonpj):
* difficulty: => Unknown
Old description:
> Perhaps related to DataKinds or ConstraintKinds, but on rebuild without a
> clean, the following error is emitted:
>
> Building glyph-0.1...
> Preprocessing executable 'glyph' for glyph-0.1...
> [34 of 60] Compiling Language.Glyph.HM.InferType (
> src/Language/Glyph/HM/InferType.hs, dist/build/glyph/glyph-
> tmp/Language/Glyph/HM/InferType.p_o )
> ghc: panic! (the 'impossible' happened)
> (GHC version 7.4.1 for x86_64-unknown-linux):
> tyThingTyCon
> Data constructor `main:Language.Glyph.Type.Normal{d r3iU}'
>
> Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>
> This can be recreated by building this cabal project:
>
> https://github.com/sonyandy/glyph/tree/ghc-panic
>
> To recreate:
>
> git clone https://github.com/sonyandy/glyph/tree/ghc-panic
>
> cabal configure
>
> cabal build
>
> touch src/Language/Glyph/HM/InferType.hs
>
> cabal build
New description:
Perhaps related to `DataKinds` or `ConstraintKinds`, but on rebuild
without a clean, the following error is emitted:
{{{
Building glyph-0.1...
Preprocessing executable 'glyph' for glyph-0.1...
[34 of 60] Compiling Language.Glyph.HM.InferType (
src/Language/Glyph/HM/InferType.hs, dist/build/glyph/glyph-
tmp/Language/Glyph/HM/InferType.p_o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
tyThingTyCon
Data constructor `main:Language.Glyph.Type.Normal{d r3iU}'
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
This can be recreated by building this cabal project:
https://github.com/sonyandy/glyph/tree/ghc-panic
To recreate:
{{{
git clone https://github.com/sonyandy/glyph/tree/ghc-panic
cabal configure
cabal build
touch src/Language/Glyph/HM/InferType.hs
cabal build
}}}
--
Comment:
Alas the first repro step fails:
{{{
bash-3.1$ git clone https://github.com/sonyandy/glyph/tree/ghc-panic
error: error setting certificate verify locations:
CAfile: /bin/curl-ca-bundle.crt
CApath: none
while accessing https://github.com/sonyandy/glyph/tree/ghc-
panic/info/refs
fatal: HTTP request failed
Initialized empty Git repository in c:/tmp/ghc-panic/.git/
}}}
I have no clue what is going on. Does it need to be `https`? Maybe
upload a tar file? Ideally cut-down a bit (especially if there are
zillions of dependencies.)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6025#comment:1>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
_______________________________________________
Glasgow-haskell-bugs mailing list
Glasgow-haskell-bugs@haskell.org
http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
