#6025: GHC Panic On Recompile
--------------------------------+-------------------------------------------
Reporter: scooty-puff | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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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
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/6025>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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