Running a simple Hello World program compiled with a GHC 6.4.1 snapshot (20050820) and profiling turned on (-prof -auto-all) under Solaris results in a segfault. The core dump is similar to a core dump posted earlier (http://www.mail-archive.com/glasgow-haskell-bugs@haskell.org/msg04621.html): (gdb) where #0 0x0003df8c in EnterFunCCS () #1 0x0004a714 in stg_PAP_info () #2 0x00045538 in schedule () #3 0x00045ff8 in waitThread_ () #4 0x00045f48 in scheduleWaitThread () #5 0x0004258c in rts_evalLazyIO () #6 0x0003bea8 in main () The other core dump was due to not compiling the entire program with profiling turned on. However, the profiling libraries are installed, so I see no reason why that should be the case now. On the other hand, when I compile with -fno-implicit-prelude (and main = main), I don't get a core dump. Have other Solaris users experienced something similar? I don't have any problems with the Linux snapshot from the same day. -- /NAD