id,summary,reporter,owner,description,type,status,priority,milestone,component,version,resolution,keywords,cc,os,architecture,failure,difficulty,testcase,blockedby,blocking,related
3430,ghci crashes,NeilMitchell,,"Given the two attached files, HLint.hs and System.Console.CmdArgs.hs, if I do:

{{{
$ ghc --version
The Glorious Glasgow Haskell Compilation System, version 6.10.3.20090530
$ runhaskell HLint.hs helm
}}}

Then GHC segfaults. This is on Windows Vista.

I looked in to reducing this bug, and totally failed. If I modify a single line, even totally unconnected, then it works. If I reduce any single output string in the program by even 1 character, it then starts working. I suspect there is a off-by-one error at some boundary condition, so while the error is 100% repeatable, it doesn't look like an easy one to debug.

I suspect that something trivial like a change in the desugaring of any construct will stop this bug happening with this particular file. However, I suspect that just means the bug moves to a different magic constant and will still be there underneath.",bug,closed,normal,,Compiler,6.10.4,worksforme,,,Unknown/Multiple,Unknown/Multiple,,Unknown,,,,