#7239: GHC panic: MkExternalCore died: make_lit
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Reporter: audunska | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.4.1 | Keywords: panic, MkExternalCore
Os: Linux | Architecture: x86_64 (amd64)
Failure: Compile-time crash | Testcase:
Blockedby: | Blocking:
Related: |
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Compiling the attached example with -fext-core crashes ghc with the
following text:
$ ghc -fext-core min.hs
[1 of 1] Compiling Main ( min.hs, min.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.4.1 for x86_64-unknown-linux):
MkExternalCore died: make_lit
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Replacing the data declaration with a newtype or a library type such as
Complex or Ratio gives the same crash. An empty .hcr file is created.
Replacing the "main" action with "return ()" or removing one of the type
synonym declarations makes the crash go away.
This is using the ghc package distributed with ubuntu 12.04.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7239>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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