Hey, after installing r2590 with backtrace support (thanks for that!) now I have the problem to catch segment faults. It seems to be a problem inside of a hash#each_pair, but I have absolutely no idea where, and because it is foreign code a file name and line number would be more than useful! ------- (gdb) run ../xx.rb compile Starting program: /usr/local/bin/macruby ../xx.rb compile Reading symbols for shared libraries + done Loading site data... Program received signal EXC_BAD_ACCESS, Could not access memory. Reason: KERN_INVALID_ADDRESS at address: 0x00007fff60771b60 0x0000000100d90283 in _cache_getMethod () (gdb) backtrace #0 0x0000000100d90283 in _cache_getMethod () #1 0x0000000100d8fa43 in look_up_method () #2 0x0000000100176c4d in __rb_vm_dispatch [inlined] () at /Users/box/ Documents/dev/macruby/macruby/vm.cpp:2780 #3 0x0000000100176c4d in rb_vm_dispatch (cache=0x108fcfac0, self=140734799741824, sel=0x102b8b570, block=0x0, opt=0 '\0', argc=1) at vm.cpp:3154 #4 0x0000000104152605 in ?? () #5 0x00000001001752b6 in rb_vm_yield0 [inlined] () at /Users/box/ Documents/dev/macruby/macruby/vm.cpp:4207 #6 0x00000001001752b6 in rb_vm_yield (argc=6687904, argv=0x7fff5fbf56f0) at vm.cpp:4214 #7 0x000000010011a978 in rb_yield_0 [inlined] () at /Users/box/ Documents/dev/macruby/macruby/vm_eval.c:194 #8 0x000000010011a978 in rb_yield_values (n=<value temporarily unavailable, due to optimizations>) at vm_eval.c:226 #9 0x0000000100039c68 in inject_i (i=1, p=140734799741792, argc=6753408, argv=0x7fff5fbf5988) at enum.c:429 #10 0x00000001001741da in rb_vm_block_eval0 (b=0x2006403c0, sel=0x0, self=8596725184, argc=1, argv=0x10a64a860) at vm.cpp:4082 #11 0x00000001001752b6 in rb_vm_yield0 [inlined] () at /Users/box/ Documents/dev/macruby/macruby/vm.cpp:4207 #12 0x00000001001752b6 in rb_vm_yield (argc=1, argv=0x7fff5fbf5988) at vm.cpp:4214 #13 0x000000010011a1f0 in rb_yield (val=8596688000) at vm_eval.c:194 #14 0x000000010004d5f7 in each_pair_i (key=8596688000, value=0) at hash.c:1099 #15 0x0000000100050c2c in rb_hash_foreach (hash=<value temporarily unavailable, due to optimizations>, func=0x10004d5e0 <each_pair_i>, farg=0) at hash.c:108 #16 0x0000000100051321 in rb_hash_each_pair (hash=8596722368, sel=0x102b2b400) at hash.c:1125 #17 0x00000001001738e1 in rb_vm_call_with_cache2 (cache=0x102b2b490, block=0x2006403c0, self=8596722368, klass=4295299792, sel=0x102b2b400, argc=<value temporarily unavailable, due to optimizations>, argv=0x0) at vm.cpp:2336 #18 0x0000000100037fd8 in enum_inject (obj=8596722368, sel=<value temporarily unavailable, due to optimizations>, argc=<value temporarily unavailable, due to optimizations>, argv=<value temporarily unavailable, due to optimizations>) at enum.c:521 #19 0x0000000100177be1 in rb_vm_dispatch (cache=0x106e620b0, self=8596722368, sel=0x102b51b30, block=0x200640420, opt=2 '\002', argc=1) at vm.cpp:2679 #20 0x0000000104152410 in ?? () #21 0x0000000104151afe in ?? () #22 0x000000010415173b in ?? () #23 0x000000010006cbe7 in rb_class_new_instance_imp (klass=1, sel=<value temporarily unavailable, due to optimizations>, argc=6755200, argv=0x104152390) at object.c:1892 #24 0x0000000100177be1 in rb_vm_dispatch (cache=0x102b69670, self=8596901376, sel=0x102b2d8b0, block=0x0, opt=0 '\0', argc=1) at vm.cpp:2679 #25 0x000000010414fe2f in ?? () #26 0x000000010414f785 in ?? () #27 0x000000010413812e in ?? () #28 0x000000010414c561 in ?? () #29 0x00000001040808f2 in ?? () #30 0x000000010003f809 in ruby_run_node (n=0x200662500) at eval.c:198 #31 0x0000000100000dd8 in main (argc=3, argv=0x102b1ba90, envp=<value temporarily unavailable, due to optimizations>) at main.cpp:42