I managed to get calling a Haskell function from an Eiffel program working with one Eiffel compiler, but when I compiled the program with a different Eiffel compiler, and ran it, I get a crash, apparently in the GHC garbage collector: (gdb) backtrace #0 0x0000000000452fc0 in evacuate () #1 0x000000000043b7f8 in scavenge_static () #2 0x0000000000439ea4 in GarbageCollect () #3 0x00000000004351df in scheduleDoGC () #4 0x00000000004353da in exitScheduler () #5 0x00000000004345a2 in hs_exit_ () #6 0x000000000041900c in T21f3 (C=0x1971f80, a1=7) at fib1.c:1200 #7 0x00000000004191a8 in T21c10 () at fib1.c:1000 #8 0x0000000000419356 in main (argc=<value optimized out>, argv=<value optimized out>) at fib1.c:11616 Can you suggest how I should go about investigating this problem further? -- Colin Adams Preston Lancashire