Segfault when receiving a MUC PM

[mdosch]

Profanity crashes with a segfault when receiving a MUC PM

Thread 1 "profanity" received signal SIGSEGV, Segmentation fault.
__strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
65	../sysdeps/x86_64/multiarch/strlen-avx2.S: Datei oder Verzeichnis nicht gefunden.
(gdb) bt
#0  __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:65
#1  0x00007ffff6c206df in __GI___strdup (s=0x0) at strdup.c:41
#2  0x00005555555b0c9d in win_print_history (window=0x55555cda8f20, message=0x55555cdd3180) at src/ui/window.c:1229
#3  0x00005555555ca294 in _chatwin_history (chatwin=0x55555cda8f20, 
    contact_barejid=0x5555556d7b50 "profanity@rooms.dismail.de") at src/ui/chatwin.c:504
#4  0x00005555555c9b23 in chatwin_incoming_msg (chatwin=0x55555cda8f20, message=0x55555ca86580, win_created=1)
    at src/ui/chatwin.c:296
#5  0x00005555555ab380 in _sv_ev_incoming_plain (chatwin=0x55555cda8f20, new_win=1, message=0x55555ca86580, logit=0)
    at src/event/server_events.c:612
#6  0x00005555555ab62a in sv_ev_incoming_carbon (message=0x55555ca86580) at src/event/server_events.c:816
#7  0x000055555559cac9 in _handle_carbons (stanza=0x55555cdbd400) at src/xmpp/message.c:1147
#8  0x000055555559cb6c in _handle_chat (stanza=0x55555cdbd400, is_mam=0) at src/xmpp/message.c:1173
#9  0x000055555559a7e7 in _message_handler (conn=0x555555d02200, stanza=0x55555cdbd400, userdata=0x555555fa34c0)
    at src/xmpp/message.c:169
#10 0x00007ffff6d64ebf in handler_fire_stanza (conn=conn@entry=0x555555d02200, stanza=stanza@entry=0x55555cdbd400)
    at src/handler.c:124
#11 0x00007ffff6d61a6b in _handle_stream_stanza (stanza=0x55555cdbd400, userdata=0x555555d02200) at src/conn.c:1181
#12 0x00007ffff6d6db0f in _end_element (userdata=0x555555fa53f0, name=<optimized out>) at src/parser_expat.c:190
#13 0x00007ffff5bbb8aa in doContent (parser=parser@entry=0x555555f22450, startTagLevel=startTagLevel@entry=0, 
    enc=<optimized out>, s=<optimized out>, end=<optimized out>, nextPtr=0x555555f22480, haveMore=1 '\001')
    at ../../src/lib/xmlparse.c:2845
#14 0x00007ffff5bbc57c in contentProcessor (parser=0x555555f22450, start=<optimized out>, end=<optimized out>, 
    endPtr=<optimized out>) at ../../src/lib/xmlparse.c:2444
#15 0x00007ffff5bbeb1c in XML_ParseBuffer (isFinal=0, len=<optimized out>, parser=0x555555f22450)
    at ../../src/lib/xmlparse.c:1893
#16 XML_ParseBuffer (parser=0x555555f22450, len=<optimized out>, isFinal=0) at ../../src/lib/xmlparse.c:1863
#17 0x00007ffff6d64794 in xmpp_run_once (ctx=0x555555fa34c0, timeout=10) at src/event.c:263
#18 0x00005555555935be in connection_check_events () at src/xmpp/connection.c:119
#19 0x0000555555592ac8 in session_process_events () at src/xmpp/session.c:256
#20 0x000055555558c294 in prof_run (log_level=0x555555647992 "INFO", account_name=0x0, config_file=0x0, log_file=0x0, theme_name=0x0) at src/profanity.c:129
#21 0x000055555561de73 in main (argc=1, argv=0x7fffffffe238) at src/main.c:180

Expected Behavior

No segfault.

Current Behavior

Segfault

Steps to Reproduce (for bugs)

1. Receive a MUC PM

Context

Debian Bullseye (Testing)

Profanity, version 0.8.1dev.master.a800bfcb
Copyright (C) 2012 - 2019 James Booth <boothj5web@gmail.com>.
Copyright (C) 2019 - 2020 Michael Vetter <jubalh@iodoru.org>.
License GPLv3+: GNU GPL version 3 or later <https://www.gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Build information:
XMPP library: libstrophe
Desktop notification support: Enabled
OTR support: Enabled (libotr 4.1.1)
PGP support: Enabled (libgpgme 1.13.1-unknown)
OMEMO support: Enabled
C plugins: Enabled
Python plugins: Enabled (2.7.18rc1)
GTK icons: Enabled

[pasis]

Backtrace is similar to #1308. Maybe sql query again?