(gdb) bt #0 rb_vm_bugreport () at ../vm_dump.c:791 #1 0x00007fd11e0746bb in report_bug (file=, line=, fmt=0x7fd11e0abcb2 "Segmentation fault", args=0x7fd11faafd48) at ../error.c:266 #2 0x00007fd11e075ab7 in rb_bug (fmt=0x7fd11e0abcb2 "Segmentation fault") at ../error.c:285 #3 0x00007fd11dfbd46f in sigsegv (sig=, info=, ctx=) at ../signal.c:603 #4 #5 malloc_consolidate (av=0x7fd11d1f2e60) at malloc.c:5155 #6 0x00007fd11cee6f38 in _int_free (av=0x7fd11d1f2e60, p=0x7fd11fd87ab0) at malloc.c:5034 #7 0x00007fd11ceea33c in *__GI___libc_free (mem=) at malloc.c:3738 #8 0x00007fd11df251c2 in obj_free (obj=140536158984040, objspace=) at ../gc.c:2317 #9 slot_sweep (objspace=0x7fd11fa4b8a0, sweep_slot=0x7fd11fbcaae0) at ../gc.c:2042 #10 0x00007fd11df26aaf in gc_sweep (objspace=0x7fd11fa4b8a0) at ../gc.c:2240 #11 0x00007fd11df26bab in rb_objspace_free (objspace=0x7fd11fa4b8a0) at ../gc.c:486 #12 0x00007fd11e029be7 in ruby_vm_destruct (vm=0x7fd11fa4af20) at ../vm.c:1620 #13 0x00007fd11df1e189 in ruby_cleanup (ex=0) at ../eval.c:187 #14 0x00007fd11df1e339 in ruby_stop (ex=) at ../eval.c:216 #15 0x00007fd11df80e4b in rb_f_fork (obj=) at ../process.c:2782 #16 rb_f_fork (obj=) at ../process.c:2769 #17 0x00007fd11e027cba in vm_call_cfunc (me=0x7fd11fb419f0, blockptr=0x7fd11fdb70d0, recv=, num=, reg_cfp=0x7fd11fdb70a8, th=0x7fd11fa4b520) at ../vm_insnhelper.c:404 #18 vm_call_method (th=0x7fd11fa4b520, cfp=0x7fd11fdb70a8, ---Type to continue, or q to quit--- num=, blockptr=0x7fd11fdb70d0, flag=, id=, me=0x7fd11fb419f0, recv=140536156182240) at ../vm_insnhelper.c:534 #19 0x00007fd11e01aea9 in vm_exec_core (th=, initial=) at ../insns.def:1015 #20 0x00007fd11e021c8a in vm_exec (th=0x7fd11fa4b520) at ../vm.c:1220 #21 0x00007fd11e022a93 in invoke_block_from_c (th=0x7fd11fa4b520, block=, self=140536156182240, argc=, argv=, blockptr=, cref=0x0) at ../vm.c:609 #22 0x00007fd11e023071 in rb_vm_invoke_proc (th=0x7fd11fa4b520, proc=0x7fd11fdae080, self=140536156182240, argc=0, argv=0x7fd11def0fd0, blockptr=0x0) at ../vm.c:655 #23 0x00007fd11e038b2f in rb_fiber_start () at ../cont.c:1148 #24 0x00007fd11ceb4d60 in ?? () from /lib/x86_64-linux-gnu/libc.so.6 #25 0x0000000000000000 in ?? ()