I guess the best time for a crash is when you are exiting the program, so it's not a show stopper but it does indicate that there is something wrong and I'm trying to get the most stable work environment possible.

Whenever I close the Houdini window by clicking on the top right window (X) button or File>Quit I get a pop up asking me to send a crash log to side effects software. This is the log:

Crash report from user; Houdini FX Version 19.5.493
Uptime 21756 seconds
Fri Feb 17 23:38:24 2023
Caught signal 6

Traceback from 149194 ThreadId=0x7f283f5d6e80
AP_Interface::coreDumpChaser(UTsignalHandlerArg) <libHoudiniUI.so>
AP_Interface::si_CrashHandler::chaser(UTsignalHandlerArg) <libHoudiniUI.so>
signalCallback(UTsignalHandlerArg) <libHoudiniUT.so>
UT_Signal::UT_ComboSignalHandler::operator()(int, siginfo_t*, void*) const <libHoudiniUT.so>
UT_Signal::processSignal(int, siginfo_t*, void*) <libHoudiniUT.so>
__sigaction <libc.so.6>
pthread_kill <libc.so.6>
raise <libc.so.6>
abort <libc.so.6>
__fsetlocking <libc.so.6>
timer_settime <libc.so.6>
__default_morecore <libc.so.6>
free <libc.so.6>
free <libai.so>
AiFree <libai.so>
_init <libai.so>
putenv <libc.so.6>
exit <libc.so.6>
UT_Exit::doExit(int, bool) <libHoudiniUT.so>
UT_Exit::exitWithSpecificCode(int) <libHoudiniUT.so>
main <libHoudiniUI.so>
__libc_init_first <libc.so.6>
__libc_start_main <libc.so.6>
main <houdini-bin>


I also get a similar message whenever a render completes, I'm rendering with arnold:

free(): invalid pointer
163767: (sent by pid 163767)
-- TRACEBACK BEGIN --
Traceback from karma 19.5.493 (Compiled on linux-x86_64-gcc9.3):
stackTrace(UTsignalHandlerArg) <libHoudiniUT.so>
signalCallback(UTsignalHandlerArg) <libHoudiniUT.so>
UT_Signal::UT_ComboSignalHandler::operator()(int, siginfo_t*, void*) const <libHoudiniUT.so>
UT_Signal::processSignal(int, siginfo_t*, void*) <libHoudiniUT.so>
pthread_kill <libc.so.6>
pthread_kill <libc.so.6>
raise <libc.so.6>
abort <libc.so.6>
__fsetlocking <libc.so.6>
timer_settime <libc.so.6>
__default_morecore <libc.so.6>
free <libc.so.6>
free <libai.so>
AiFree <libai.so>
_init <libai.so>
putenv <libc.so.6>
exit <libc.so.6>
UT_Exit::doExit(int, bool) <libHoudiniUT.so>
UT_Exit::exit(UT_Exit::UT_ExitCode) <libHoudiniUT.so>
std::runtime_error::what() const <husk>
__libc_init_first <libc.so.6>
__libc_start_main <libc.so.6>
std::runtime_error::what() const <husk>
-- TRACEBACK END --

When I do not have arnold loaded it only sometimes crashes on exit with this output on the command line:

166630: Fatal error: Segmentation fault (sent by pid 10092)

Any thoughts?

unfortunately in ubuntu 22.04.1 itself houdini trying to crash suddenly
i think this issue related on ubuntu itself
but , i tried houdini in ubuntu based distros like kde neon , pop os , elementary os ,working good , but not working good on ubuntu itself
currently i'm using houdini in fedora 37 working nicely

It looks like the crash may be in libai, which is part of Arnold. I would recommend that you reach out to their support team and see if they have any ideas.

johnmather
looks like the crash may be in libai,

Still crashes without arnold loaded.

I take it back, I thought I tried loading without Arnold and it crashed, I was pretty sure it crashed. But now it's fine without Arnold loaded. So I guess this one is related to the libai.

davidostler
I take it back, I thought I tried loading without Arnold and it crashed, I was pretty sure it crashed. But now it's fine without Arnold loaded. So I guess this one is related to the libai.

Did you managed to fix it ?

Keep your folder /home/user/houdini19.5.Bak,Relaunch again,if stil crash,Something else or maybe version houdini.
The most crash in linux,A cause graphic card,Try update driver Or try download package exactly version,After Install manually .