gistfile1.txt

(gdb) run -e 'Thread.new{ Fiber.new{} }.join'
The program being debugged has been started already.
Start it from the beginning? (y or n) y
Starting program: /Users/lourens/projects/ruby187/miniruby -e 'Thread.new{ Fiber.new{} }.join'
miniruby(29493) malloc: *** error for object 0x803e00: double free
*** set a breakpoint in malloc_error_break to debug

Breakpoint 1, 0x9452b4a9 in malloc_error_break ()
(gdb) bt
#0  0x9452b4a9 in malloc_error_break ()
#1  0x94526497 in szone_error ()
#2  0x94450463 in szone_free ()
#3  0x944502cd in free ()
#4  0x000337aa in rb_thread_die (th=0x802400) at eval.c:10790
#5  0x000337e0 in rb_thread_remove (th=0x802400) at eval.c:10801
#6  0x000363c6 in rb_thread_start_0 (fn=0x3659a <rb_thread_yield>, arg=0x1464c8, th=0x802400) at eval.c:12262
#7  0x000367e7 in rb_thread_initialize (thread=1336540, args=1336520) at eval.c:12409
#8  0x00028f65 in call_cfunc (func=0x3671e <rb_thread_initialize>, recv=1336540, len=-2, argc=0, argv=0x0) at eval.c:5746
#9  0x00028390 in rb_call0 (klass=1391140, recv=1336540, id=2961, oid=2961, argc=0, argv=0x0, body=0x1539c0, flags=2) at eval.c:5904
#10 0x00029b63 in rb_call (klass=1391140, recv=1336540, mid=2961, argc=0, argv=0x0, scope=1, self=6) at eval.c:6151
#11 0x00029f42 in rb_funcall2 (recv=1336540, mid=2961, argc=0, argv=0x0) at eval.c:6287
#12 0x0002d2f5 in rb_obj_call_init (obj=1336540, argc=0, argv=0x0) at eval.c:7770
#13 0x000366da in rb_thread_s_new (argc=0, argv=0x0, klass=1391140) at eval.c:12363
#14 0x00028f89 in call_cfunc (func=0x36697 <rb_thread_s_new>, recv=1391140, len=-1, argc=0, argv=0x0) at eval.c:5749
#15 0x00028390 in rb_call0 (klass=1391120, recv=1391140, id=3361, oid=3361, argc=0, argv=0x0, body=0x1539e8, flags=0) at eval.c:5904
#16 0x00029b63 in rb_call (klass=1391120, recv=1391140, mid=3361, argc=0, argv=0x0, scope=0, self=1403220) at eval.c:6151
#17 0x00021aeb in rb_eval (self=1403220, n=0x1465a4) at eval.c:3492
#18 0x000207df in rb_eval (self=1403220, n=0x146518) at eval.c:3222
#19 0x0002187f in rb_eval (self=1403220, n=0x1464f0) at eval.c:3486
#20 0x0001c2e6 in eval_node (self=1403220, node=0x1464f0) at eval.c:1436
#21 0x0001ca0b in ruby_exec_internal () at eval.c:1641
#22 0x0001ca5c in ruby_exec () at eval.c:1661
#23 0x0001ca8a in ruby_run () at eval.c:1671
#24 0x00001a0c in main (argc=3, argv=0xbffff7ec, envp=0xbffff7fc) at main.c:48
(gdb)