bug#16324: 24.3.50; Crashing on OSX 10.6.8 (built --with-ns)

[Keith David Bershatsky]

I think this is probably what you were looking for.  Today is my first day 
learning how to use gdb:

Last login: Thu Jan  2 16:01:10 on ttys001
MP:~ HOME$ cd /Users/HOME/Desktop/emacs-trunk-01-01-2014/src/
MP:src HOME$ gdb /Users/HOME/.0.data/.0.emacs/Emacs.app/Contents/MacOS/Emacs
GNU gdb 6.3.50-20050815 (Apple version gdb-1515) (Sat Jan 15 08:33:48 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
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This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared 
libraries ........... done

DISPLAY = /tmp/launch-N6Y4z5/org.x:0
TERM = xterm-color
Breakpoint 1 at 0x1000a5170: file emacs.c, line 351.
Breakpoint 2 at 0x1000c3be4: file sysdep.c, line 850.
(gdb) run
Starting program: /Users/HOME/.0.data/.0.emacs/Emacs.app/Contents/MacOS/Emacs 
Reading symbols for shared libraries 
.++++++++++...............................................................................
 done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Emacs(1148,0x7fff71079cc0) malloc: *** error for object 0x116443608: incorrect 
checksum for freed object - object was probably modified after being freed.
*** set a breakpoint in malloc_error_break to debug

Program received signal SIGABRT, Aborted.
0x00007fff89abe0b6 in __kill ()
(gdb) bt
#0  0x00007fff89abe0b6 in __kill ()
#1  0x00007fff89b5e9f6 in abort ()
#2  0x00007fff89b4d62d in szone_error ()
#3  0x00007fff89a7a66f in small_free_list_remove_ptr ()
#4  0x00007fff89a770db in szone_free_definite_size ()
#5  0x0000000100102a91 in lisp_free (block=0x116230400) at alloc.c:931
#6  0x00000001001074d5 in Fgarbage_collect () at alloc.c:6495
#7  0x0000000100158519 in exec_byte_code (bytestr=1148, 
vector=266896620757450753, maxdepth=0, args_template=4320145466, nargs=131, 
args=0x0) at lisp.h:4514
#8  0x000000010012028b in funcall_lambda (fun=4364230573, nargs=1, 
arg_vector=0x7fff5fbfcfa8) at eval.c:3040
#9  0x000000010012054d in Ffuncall (nargs=2, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2867
#10 0x0000000100157f7b in exec_byte_code (bytestr=2, vector=1, 
maxdepth=-1149410096387949562, args_template=4320145466, nargs=33, args=0x0) at 
bytecode.c:919
#11 0x000000010012028b in funcall_lambda (fun=4364929437, nargs=1, 
arg_vector=0x7fff5fbfd1a0) at eval.c:3040
#12 0x000000010012054d in Ffuncall (nargs=2, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2867
#13 0x0000000100157f7b in exec_byte_code (bytestr=2, vector=1, 
maxdepth=-1149410096387949562, args_template=4320145466, nargs=33, args=0x0) at 
bytecode.c:919
#14 0x000000010012028b in funcall_lambda (fun=4332012773, nargs=6, 
arg_vector=0x7fff5fbfd320) at eval.c:3040
#15 0x0000000100121908 in apply_lambda (fun=4332012773, args=4362432026) at 
eval.c:2915
#16 0x000000010011f921 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2251
#17 0x000000010011fe74 in Fsetq (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:536
#18 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#19 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#20 0x0000000100123088 in Fwhile (args=4332012773) at eval.c:989
#21 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#22 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#23 0x00000001001235f1 in FletX (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:897
#24 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#25 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#26 0x00000001001202e0 in funcall_lambda (fun=4334326870, nargs=0, 
arg_vector=0x7fff5fbfd8b0) at eval.c:3033
#27 0x0000000100121908 in apply_lambda (fun=4334326870, args=4320145466) at 
eval.c:2915
#28 0x000000010011f921 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2251
#29 0x000000010011fe74 in Fsetq (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:536
#30 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#31 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#32 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#33 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#34 0x0000000100123088 in Fwhile (args=4334326870) at eval.c:989
#35 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#36 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#37 0x0000000100112ec7 in Fsave_restriction (body=4334167206) at editfns.c:3415
#38 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#39 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#40 0x0000000100112e07 in Fsave_excursion (args=4334167254) at editfns.c:941
#41 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#42 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#43 0x0000000100123347 in Flet (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:967
#44 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#45 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#46 0x0000000100112e67 in Fsave_current_buffer (args=4334169142) at 
editfns.c:954
#47 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#48 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#49 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#50 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#51 0x00000001001235f1 in FletX (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:897
#52 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#53 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#54 0x00000001001202e0 in funcall_lambda (fun=4334167478, nargs=3, 
arg_vector=0x7fff5fbfe5a8) at eval.c:3033
#55 0x000000010012054d in Ffuncall (nargs=4, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2867
#56 0x0000000100120d72 in Fapply (nargs=4, args=0x7fff5fbfe5a0) at eval.c:2292
#57 0x000000010011fd42 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2148
#58 0x000000010011fe74 in Fsetq (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:536
#59 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#60 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#61 0x000000010011e8f7 in internal_catch (tag=4331910290, func=0x10011ff30 
<Fprogn>, arg=4334197254) at eval.c:1109
#62 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#63 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#64 0x0000000100123088 in Fwhile (args=4) at eval.c:989
#65 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#66 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#67 0x0000000100123088 in Fwhile (args=4) at eval.c:989
#68 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#69 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#70 0x00000001001235f1 in FletX (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:897
#71 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#72 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#73 0x00000001001202e0 in funcall_lambda (fun=4334175862, nargs=4, 
arg_vector=0x7fff5fbfece0) at eval.c:3033
#74 0x0000000100121908 in apply_lambda (fun=4334175862, args=4363406682) at 
eval.c:2915
#75 0x000000010011f921 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2251
#76 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#77 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#78 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#79 0x00000001001235f1 in FletX (args=<value temporarily unavailable, due to 
optimizations>) at eval.c:897
#80 0x000000010011fd83 in eval_sub (form=<value temporarily unavailable, due to 
optimizations>) at eval.c:2124
#81 0x000000010011ff5d in Fprogn (body=<value temporarily unavailable, due to 
optimizations>) at eval.c:459
#82 0x00000001001202e0 in funcall_lambda (fun=4334875542, nargs=0, 
arg_vector=0x7fff5fbff1a0) at eval.c:3033
#83 0x000000010012054d in Ffuncall (nargs=1, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2867
#84 0x0000000100120de6 in apply1 (fn=4334156962, arg=<value temporarily 
unavailable, due to optimizations>) at eval.c:2572
#85 0x000000010011ca5f in Fcall_interactively (function=4334156962, 
record_flag=4320145466, keys=4672935237) at callint.c:378
#86 0x0000000100120751 in Ffuncall (nargs=4, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2813
#87 0x0000000100157f7b in exec_byte_code (bytestr=4, vector=4320145466, 
maxdepth=-1149410096387949562, args_template=4100, nargs=35, 
args=0x7fff5fbff528) at bytecode.c:919
#88 0x000000010012054d in Ffuncall (nargs=2, args=<value temporarily 
unavailable, due to optimizations>) at eval.c:2867
#89 0x000000010012097e in call1 (fn=<value temporarily unavailable, due to 
optimizations>, arg1=<value temporarily unavailable, due to optimizations>) at 
eval.c:2605
#90 0x00000001000ba1c7 in command_loop_1 () at keyboard.c:1552
#91 0x000000010011ea43 in internal_condition_case (bfun=0x1000b9c70 
<command_loop_1>, handlers=4320211946, hfun=0x1000b1600 <cmd_error>) at 
eval.c:1345
#92 0x00000001000affd7 in command_loop_2 (ignore=<value temporarily 
unavailable, due to optimizations>) at keyboard.c:1170
#93 0x000000010011e8f7 in internal_catch (tag=4320208138, func=0x1000affa0 
<command_loop_2>, arg=4320145466) at eval.c:1109
#94 0x00000001000af45c in recursive_edit_1 () at keyboard.c:1149
#95 0x00000001000b1897 in Frecursive_edit () at keyboard.c:841
#96 0x00000001000a79b3 in main (argc=1, argv=0x7fff5fbff988) at emacs.c:1637
Unsafe to run code: malloc zone lock is held for some zone..
Canceling call as the malloc lock is held so it isn't safe to call the runtime.
Issue the command:
    set objc-non-blocking-mode off 
to override this check if you are sure your call doesn't use the malloc 
libraries or the ObjC runtime.
(gdb)