crash on readChan/writeChan

[guest]

Source code:

 http://www.seas.upenn.edu/~lipeng/tmp/ghc_smp_bug.tar.gz

Compile using the latest Linux binary snapshot (ghc-6.5.20060223):

$ ghc -fglasgow-exts -smp Server.hs --make -o Server.bin

Run on a 2-way SMP machine:

$ ./Server.bin +RTS -N1

.... .... Server.bin: internal error: EVACUATED object entered!

Please report this as a compiler bug. See: http://www.haskell.org/ghc/reportabug

Aborted

Sometimes I get segmentation fault instead of the above error messages. 100% reproducable on 4 different Linux machines. This bug can be also reproduced using +RTS -N2 by slighly changing the source code. Also reproducable on an older version (20060205). Is it a bug or am I using GHC incorrectly?

[wolfgang]

Confirmed. Also crashes on Mac OS X/PPC with both non-threaded and threaded RTS. No crash with GHC 6.4.1.

[simonmar]

Fixed, thanks.