#3787: GHC 6.12.1 panic
---------------------------------+------------------------------------------
Reporter: blamario | Owner: simonmar
Type: bug | Status: new
Priority: high | Milestone: 6.12.2
Component: Compiler | Version: 6.12.1
Resolution: | Keywords: panic
Difficulty: | Os: Linux
Testcase: | Architecture: x86_64 (amd64)
Failure: Compile-time crash |
---------------------------------+------------------------------------------
Changes (by simonmar):
* priority: normal => high
* difficulty: =>
* owner: => simonmar
* milestone: => 6.12.2
Old description:
> GHC 6.12.1 reports the following when compiling the attached module:
>
> $ ghc --make Trampoline.hs -O[1 of 1] Compiling
> Control.Concurrent.SCC.Trampoline ( Trampoline.hs, Trampoline.o )
> ghc: panic! (the 'impossible' happened)
> (GHC version 6.12.1 for x86_64-unknown-linux):
> expectJust chooseExternalIds: ds_d1HQ
>
> Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
>
> So I'm dutifully reporting it. The module in question could probably be
> easily trimmed down, but I'm too sleepy at the moment. Let me know if you
> need that.
New description:
GHC 6.12.1 reports the following when compiling the attached module:
{{{
$ ghc --make Trampoline.hs -O[1 of 1] Compiling
Control.Concurrent.SCC.Trampoline ( Trampoline.hs, Trampoline.o )
ghc: panic! (the 'impossible' happened)
(GHC version 6.12.1 for x86_64-unknown-linux):
expectJust chooseExternalIds: ds_d1HQ
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
So I'm dutifully reporting it. The module in question could probably be
easily trimmed down, but I'm too sleepy at the moment. Let me know if you
need that.
Comment:
I'll look at this, probably my fault as I modified `chooseExternalIds`
last.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3787#comment:2>
GHC <http://www.haskell.org/ghc/>
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