Here's the gdb stacktrace:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7fe2fe2046e0 (LWP 28459)]
0x000000000046b557 in clear_lwpid_callback (thread=0x497a010, dummy=0x0) at
/build/buildd/gdb-6.8/gdb/linux-thread-db.c:795
795 /build/buildd/gdb-6.8/gdb/linux-thread-db.c: No such file or directory.
in /build/buildd/gdb-6.8/gdb/linux-thread-db.c
(gdb) bt
#0 0x000000000046b557 in clear_lwpid_callback (thread=0x497a010, dummy=0x0) at
/build/buildd/gdb-6.8/gdb/linux-thread-db.c:795
#1 0x00000000004f0433 in iterate_over_threads (callback=0x46b550
<clear_lwpid_callback>, data=0x0) at /build/buildd/gdb-6.8/gdb/thread.c:212
#2 0x000000000046d423 in thread_db_resume (ptid={pid = 28464, lwp = 28464, tid
= 0}, step=1, signo=TARGET_SIGNAL_0)
at /build/buildd/gdb-6.8/gdb/linux-thread-db.c:812
#3 0x00000000004e7d2a in resume (step=1, sig=TARGET_SIGNAL_0) at
/build/buildd/gdb-6.8/gdb/infrun.c:651
#4 0x00000000004e7ff0 in keep_going (ecs=0x7fff06224d20) at
/build/buildd/gdb-6.8/gdb/infrun.c:2975
#5 0x00000000004e8d98 in handle_inferior_event (ecs=0x7fff06224d20) at
/build/buildd/gdb-6.8/gdb/infrun.c:2228
#6 0x00000000004eab6a in wait_for_inferior (treat_exec_as_sigtrap=0) at
/build/buildd/gdb-6.8/gdb/infrun.c:1042
#7 0x00000000004eaeb7 in proceed (addr=<value optimized out>,
siggnal=TARGET_SIGNAL_0, step=0) at /build/buildd/gdb-6.8/gdb/infrun.c:844
#8 0x00000000004e4f7e in run_command_1 (args=0x0, from_tty=1,
tbreak_at_main=<value optimized out>) at /build/buildd/gdb-6.8/gdb/infcmd.c:563
#9 0x000000000044e28a in execute_command (p=0x26841a1 "", from_tty=1) at
/build/buildd/gdb-6.8/gdb/top.c:449
#10 0x00000000004f650b in command_handler (command=0x26841a0 "") at
/build/buildd/gdb-6.8/gdb/event-top.c:518
#11 0x00000000004f73dc in command_line_handler (rl=<value optimized out>) at
/build/buildd/gdb-6.8/gdb/event-top.c:804
#12 0x00007fe2fddf0ea7 in rl_callback_read_char () from /lib/libreadline.so.5
#13 0x00000000004f6829 in rl_callback_read_char_wrapper (client_data=0x497a010)
at /build/buildd/gdb-6.8/gdb/event-top.c:177
#14 0x00000000004f512d in process_event () at
/build/buildd/gdb-6.8/gdb/event-loop.c:341
#15 0x00000000004f5ae6 in gdb_do_one_event (data=<value optimized out>) at
/build/buildd/gdb-6.8/gdb/event-loop.c:378
#16 0x00000000004f2634 in catch_errors (func=0x4f58e0 <gdb_do_one_event>,
func_args=0x0, errstring=0x64a577 "", mask=<value optimized out>)
at /build/buildd/gdb-6.8/gdb/exceptions.c:513
#17 0x0000000000497940 in tui_command_loop (data=<value optimized out>) at
/build/buildd/gdb-6.8/gdb/tui/tui-interp.c:153
#18 0x0000000000446169 in captured_command_loop (data=0x497a010) at
/build/buildd/gdb-6.8/gdb/main.c:99
#19 0x00000000004f2634 in catch_errors (func=0x446160 <captured_command_loop>,
func_args=0x0, errstring=0x64a577 "", mask=<value optimized out>)
at /build/buildd/gdb-6.8/gdb/exceptions.c:513
#20 0x0000000000446c7e in captured_main (data=<value optimized out>) at
/build/buildd/gdb-6.8/gdb/main.c:883
#21 0x00000000004f2634 in catch_errors (func=0x4461a0 <captured_main>,
func_args=0x7fff06225430, errstring=0x64a577 "", mask=<value optimized out>)
at /build/buildd/gdb-6.8/gdb/exceptions.c:513
#22 0x0000000000446154 in gdb_main (args=<value optimized out>) at
/build/buildd/gdb-6.8/gdb/main.c:892
#23 0x0000000000446126 in main (argc=<value optimized out>, argv=0x0) at
/build/buildd/gdb-6.8/gdb/gdb.c:33
--
gdb crashes when debugging firefox after an exec
https://bugs.launchpad.net/bugs/319418
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