Hi! at the moment I'm writing a haskell/C programm using the FFI. But I'm getting always a segfault in the haskell part (according to gdb) . With Linux the segfault happens at random (while I'm doing a lot of calls to haskell via a dynamically exported function). With Unix gdb says it occurs in 'StgReturn' called from 'stg_returnToStackTop' after the C part finishes it job. I already put a C frontend instead of the haskell part and searched for access violations and other memory missmanagement in the C part (none). I also disabled (with no effect) all finalizers of the ForeignObj's used. As I'm relatively new to Haskell I don't know how to hunt that one down. Unfortunately the programm is already huge (ca. 4000 LOC Haskell & C) so the buggy part of the programm is not obvious (for me). Could someone give me a hint/technique how to approach the problem? bye, Axel the system I used are Linux : Suse 7.0, ghc4.08.1 gcc 2.95.2 Unix : Solaris 2.6, ghc4.08 gcc 2.95.2 and ghc4.08.1 egcs1.1.2