RE: Segfaulting programs with GHC 6.4.1

On 21 October 2005 09:24, John Goerzen wrote:

On 2005-10-20, John Goerzen wrote:

...

I am running GHC 6.4.1 on Linux x86. I have a program that is multithreaded, and since the upgrade from GHC 6.4, the program is segfaulting.

Some additional data:

* Removing -O2 from the compile flags didn't help. (If anything, it made things worse.)

* You can see the source for this program with:

darcs get --partial --tag=bug20051020 http://darcs.complete.org/gopherbot

Yes, it is what it sounds like ;-)

At this stage we need to resort to gdb. Run the version of the program compiled with -debug under gdb, and take a look at the backtrace when it crashes. Hopefully it'll be somewhere in the RTS, if it's somewhere in Haskell code you won't get an informative backtrace. If it's possible for us to reproduce the bug here, I'll happily take a look. Cheers, Simon