the impossible happened

[Simon Peyton-Jones]

This "fromJust" bug is SourceForge 1177320.

The trouble is that we've been unable to reproduce it here.  It seems to
show up when compiling some large thing, like Darcs or WASH.

If anyone would be willing to snapshot a tree exhibiting the bug, and
send it to us, we'd love to investigate.  Until then we're a bit stuck.

Simon


| -----Original Message-----
| From: glasgow-haskell-bugs-bounces at haskell.org
[mailto:glasgow-haskell-bugs-
| bounces at haskell.org] On Behalf Of Frederik Eaton
| Sent: 21 May 2005 11:49
| To: glasgow-haskell-bugs at haskell.org
| Subject: the impossible happened
| 
| ghc-6.4: panic! (the `impossible' happened, GHC version 6.4):
|         Maybe.fromJust: Nothing
| 
| Please report it as a compiler bug to
glasgow-haskell-bugs at haskell.org,
| or http://sourceforge.net/projects/ghc/.
| 
| I think this was the command line:
| 
| /home/frederik/arch/i386/bin/ghc -odir dist/build/../webpage.cgi-tmp
-hidir dist/build/../webpage.cgi-
| tmp -o dist/build/../webpage.cgi --make -i.. -O3 -fignore-asserts
-fglasgow-exts -package base-1.0 -
| package posix-1.0 -package haskell98-1.0 -package WASH-CGI -package
WASHHTML
| ../maint/webpage.hs -v
| 
| Frederik
| 
| --
| http://ofb.net/~frederik/
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