#1714: GHC crashes when encountering arrow syntax
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Reporter: [EMAIL PROTECTED] | Owner:
Type: bug | Status: closed
Priority: high | Milestone: 6.8.1
Component: Compiler | Version: 6.8
Severity: critical | Resolution: duplicate
Keywords: | Difficulty: Unknown
Os: Linux | Testcase:
Architecture: x86 |
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Changes (by ross):
* resolution: => duplicate
* status: new => closed
Old description:
> Compiling the following code makes GHC 6.8.20070916 crash:
> {{{
> {-# LANGUAGE Arrows #-}
> module ArrowSyntax where
> import Control.Arrow
>
> arrow :: (Arrow arrow) => arrow () ()
> arrow = proc () -> do returnA -< ()
> }}}
> The message is:
> {{{
> ghc-6.8.0.20070916: panic! (the 'impossible' happened)
> (GHC version 6.8.0.20070916 for i386-unknown-linux):
> initC: srt_lbl
>
> Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
> }}}
> I encountered the same behavior with other expressions using arrow
> syntax, so the arrow syntax really seems to be the cause of this panic.
New description:
Compiling the following code makes GHC 6.8.20070916 crash:
{{{
{-# LANGUAGE Arrows #-}
module ArrowSyntax where
import Control.Arrow
arrow :: (Arrow arrow) => arrow () ()
arrow = proc () -> do returnA -< ()
}}}
The message is:
{{{
ghc-6.8.0.20070916: panic! (the 'impossible' happened)
(GHC version 6.8.0.20070916 for i386-unknown-linux):
initC: srt_lbl
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
I encountered the same behavior with other expressions using arrow syntax,
so the arrow syntax really seems to be the cause of this panic.
Comment:
same as #1662
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1714>
GHC <http://www.haskell.org/ghc/>
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