segfaults arrggg

[crazdefool]

Is anyone else segfaulting? arrggg... could someone tell me how to get some debugging info..

[deathinc]

I didn't have time to test, but I did get 1 segfault whan adding members to a group... Didn't have packet logging on, and didn't have it running in gdb. Sorry guys. Mabye get more info later today. :(

[Ratt]

There's a bug in the group code where if someone leaves your group, and then someone else joins, it will seg fault.

I've been trying to track it down for a couple days now, but I can't seem to duplicate it on command every single time. It's one of those wretched intermittent things that drive you crazy.

[crazdefool]

dont think thats my problem.. I wasn't grouped when i was having the seg faults. Im gonna try gcc via RPM this time, perhaps my compile didn't work...

[deathinc]

Ratt,

Would a backtrace be helpful with the group bug?

[Zaphod]

For any crash bug a stack back trace and if possible the values of any obvious local variables would be helpful.

Thanks and Enjoy,
Zaphod (dohpaZ)

[deathinc]

It's happened twice tonight, once I had it in Kdevelop and got some of the variable info, but didn't save it... This time I've got the core file... I'll get more info next time.

Here's a backtrace -- almost identical to the one I saw inside Kdevelop. (I removed my character name from the info in #3)

#0 0x401722b1 in operator==(QString const&, QString const&) ()
from /usr/local/qt/lib/libqt-mt.so.2
#1 0x08116388 in GroupMgr::handleGroupInfo(groupMemberStruct const*) (
this=0x81b89d0, gmem=0xbfffe822) at spawn.h:150
#2 0x0809558e in EQPacket::groupInfo(groupMemberStruct const*) (
this=0x81a8fb0, t0=0xbfffe822) at m_packet.cpp:2583
#3 0x0808f19d in EQPacket::dispatchZoneData(unsigned, unsigned char*, unsigned char) (this=0x81a8fb0, len=230, data=0xbfffe822 "&@<REMOVED>",
direction=2 '\002') at packet.cpp:2603
#4 0x0808e334 in EQPacket::decodePacket(int, unsigned char*) (this=0x81a8fb0,
size=270, buffer=0xbfffe7fe "E") at packet.h:407
#5 0x0808da14 in EQPacket::processPackets() (this=0x81a8fb0) at packet.cpp:748
#6 0x4021e5fe in QObject::activate_signal(char const*) ()
from /usr/local/qt/lib/libqt-mt.so.2
#7 0x4027c6e3 in QTimer::timeout() () from /usr/local/qt/lib/libqt-mt.so.2
#8 0x4025b613 in QTimer::event(QEvent*) ()
from /usr/local/qt/lib/libqt-mt.so.2
#9 0x401d4d58 in QApplication::notify(QObject*, QEvent*) ()
from /usr/local/qt/lib/libqt-mt.so.2
#10 0x4019d7b4 in qt_activate_timers() () from /usr/local/qt/lib/libqt-mt.so.2
#11 0x4019b26c in QApplication::processNextEvent(bool) ()
from /usr/local/qt/lib/libqt-mt.so.2
#12 0x401d7063 in QApplication::enter_loop() ()
from /usr/local/qt/lib/libqt-mt.so.2
#13 0x4019ada4 in QApplication::exec() () from /usr/local/qt/lib/libqt-mt.so.2
#14 0x0805ed8c in main (argc=3, argv=0xbffff9c4) at main.cpp:946
#15 0x40707627 in __libc_start_main (main=0x805c0e0 <main>, argc=3,
ubp_av=0xbffff9c4, init=0x8058550 <_init>, fini=0x8120850 <_fini>,
rtld_fini=0x4000dcc4 <_dl_fini>, stack_end=0xbffff9bc)
at ../sysdeps/generic/libc-start.c:129

[crazdefool]

Im a newb when it comes to coding/debugging.. unless its sql.. anyhow.. can someone explain how to dump that info? I seg fault enough to go back to the 3.1.2 hacked up version for now..

[deathinc]

From your showeq/src directory...

Run 'gdb'

'file showeq'
'core-file /full/path/and/filename/to/the/core.file'
'bt'

Should dump that backtrace...

[winseq]

Any idea how to turn on core dumps?

I remember wanting to turn these off a long time ago and since my seg faults don't generate core dumps, I imagine I succeeded...

[mvern]

Try 'ulimit -c unlimited'.