#3275: ghc: panic! (the 'impossible' happened)
-------------------------+--------------------------------------------------
Reporter: EricKow | Owner:
Type: bug | Status: new
Priority: normal | Milestone: 6.10.4
Component: Compiler | Version: 6.10.3
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Testcase: | Os: MacOS X
Architecture: x86 |
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Changes (by igloo):
* milestone: => 6.10.4
Comment:
I can't reproduce this on my OS X/x86 machine, with the 6.10.3 installer
from the GHC download page and a hand-compiled cabal-install.
I also can't install that beta. It says
{{{
The following install step failed: run postinstall script for hp-
postflight. Con
tact the software manufacturer for assistance.
}}}
Eric, can you see if you can reproduce it by running `./Setup build`, or
even `ghc --make`, by hand please?
If you could boil it down to a minimal testcase then that would be very
useful indeed. Just try replacing right hand sides of top-level things
with undefined, and remove functions and imports that are no longer used
as a result (warnings are a great help here).
In particular, removing dependencies on other packages, and removing any
special preprocessing etc, is valuable, so that the bug can be reproduced
with just `ghc --make ...`.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3275#comment:4>
GHC <http://www.haskell.org/ghc/>
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