Crash at identification and no debugging available

[triaxx@…]

Bitlbee crashes when I try to identify a user from irssi. It has been compiled using gcc 4.9.2 to avoid suspicion of problem with old gcc. I cannot debug since it seems to have a problem of memory access in my binary as shown in the GDB output:

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Reading symbols from /usr/pkg/sbin/bitlbee...done.
(gdb) break cmd_identify
Breakpoint 1 at 0x240f0: file root_commands.c, line 108.
(gdb) run
Starting program: /usr/pkg/sbin/bitlbee -Dnv
Error in re-setting breakpoint 1: Cannot access memory at address 0x240f0
Error in re-setting breakpoint 1: Cannot access memory at address 0x240f0
Warning: Unable to create UNIX socket: Protocol not supported

Program received signal SIGSEGV, Segmentation fault.
0x00007f7ff50c8f3b in ?? ()
(gdb) bt
#0  0x00007f7ff50c8f3b in ?? ()
#1  0x000000000021d12d in ?? ()
#2  0x00007f7ff7702190 in ?? ()
#3  0x0000000000000000 in ?? ()

[dx]

So... rebuild with debug symbols, ./configure --debug=1

Also, if you have any plugins, try again removing all of them.

[dx]

This is fixed in ​this commit

For context: the backtrace above did have debug symbols, but gcc generated them incorrectly for some reason, while clang worked fine.

Program received signal SIGSEGV, Segmentation fault.
0x00007f7ff54c8f3b in strncpy () from /usr/lib/libc.so.12
(gdb) bt
#0  0x00007f7ff54c8f3b in strncpy () from /usr/lib/libc.so.12
#1  0x000000000041f316 in irc_channel_name_gen (irc=0x7f7ff7704090, hint=0x7f7ff6f10480 "twitter_xxx") at irc_channel.c:600
#2  0x000000000041f41b in irc_channel_name_hint (ic=0x7f7ff6f02270, name=0x7f7ff6f10480 "twitter_xxx") at irc_channel.c:628
#3  0x000000000041c628 in bee_irc_chat_name_hint (bee=0x7f7ff770a140, c=0x7f7ff770a080, name=0x7f7ff6f10480 "twitter_xxx")
    at irc_im.c:698
#4  0x0000000000440f05 in imcb_chat_name_hint (c=0x7f7ff770a080, name=0x7f7ff6f10480 "twitter_xxx") at bee_chat.c:61
#5  0x000000000048f36c in twitter_groupchat_init (ic=0x7f7ff774d390) at twitter.c:319
#6  0x000000000048f63d in twitter_main_loop_start (ic=0x7f7ff774d390) at twitter.c:279
#7  0x000000000048f4ce in twitter_login_finish (ic=0x7f7ff774d390) at twitter.c:348
#8  0x0000000000496ce5 in twitter_get_users_lookup (ic=0x7f7ff774d390) at twitter_lib.c:365
#9  0x0000000000496e2e in twitter_http_get_users_lookup (req=0x7f7ff774a270) at twitter_lib.c:409
#10 0x00000000004326f2 in http_incoming_data (data=0x7f7ff774a270, source=19, cond=B_EV_IO_READ) at http_client.c:301
#11 0x0000000000431301 in gaim_io_invoke (source=0x7f7ff7701880, condition=G_IO_IN, data=0x7f7ff77073c0) at events_glib.c:86
#12 0x00007f7ff704371d in g_main_context_dispatch () from /usr/pkg/lib/libglib-2.0.so.0
#13 0x00007f7ff70439fe in g_main_context_iterate.clone () from /usr/pkg/lib/libglib-2.0.so.0
#14 0x00007f7ff7043cad in g_main_loop_run () from /usr/pkg/lib/libglib-2.0.so.0
#15 0x0000000000431130 in b_main_run () at events_glib.c:59
#16 0x000000000042ea56 in main (argc=2, argv=0x7f7fffffda60) at unix.c:170
(gdb)