#5684: ghc: panic! (the 'impossible' happened)
---------------------------------+------------------------------------------
Reporter: selinger | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.2.1 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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I seem to have found an "impossible" bug, and I am reporting it here as
instructed.
The bug can be reliably reproduced with gcc-7.2.2. I can reproduce this
bug with both the binaries from the generic 64-bit linux distribution
ghc-7.2.2-x86_64-unknown-linux.tar.bz2, and the generic 32-bit linux
distribution ghc-7.2.2-i386-unknown-linux.tar.bz2 (these were the only two
I tried).
Unfortunately, I can't publicly send the source code, because it is part
of a confidential project. However, if this bug is not yet known/fixed, I
can probably produce a minimal and "sanitized" example.
Here is what I get:
{{{
ghc -o qcs Main.hs
[ 9 of 10] Compiling BWT ( BWT.hs, BWT.o )
ghc: panic! (the 'impossible' happened)
(GHC version 7.2.2 for i386-unknown-linux):
Unexpected given!
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
make: *** [qcs] Error 1
}}}
Please let me know how I can proceed to collect more information on this
bug! Thanks, -- Peter
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5684>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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