bug in compacting GC

Bulat Ziganshin bulatz at HotPOP.com
Fri Feb 3 16:30:17 EST 2006

Hello ,

yes, i found this famous "-c" bug! the humor of situation is what
easiest way to got this bug is to run ghc itself! :)  it seems that
noone except me tried this ever. i just found that any large enough
module raises this error!!! that, for example, results of compiling
Data.Map module:

>ghc Map.hs  -cpp  +RTS -c
ghc.EXE: internal error: update_fwd: unknown/strange object  39004
    Please report this as a bug to glasgow-haskell-bugs at haskell.org,
    or http://www.sourceforge.net/projects/ghc/

ghc 6.4.1/mingw32. the error is absolutely reproducible, so at least
now we had case, even lot of cases :)

or you wanna a smaller program? :)

Best regards,
 Bulat                          mailto:bulatz at HotPOP.com

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