Qt application crashes at launch but running good via debbugging tools

Asked Feb 15 '23 at 12:50

Active Feb 15 '23 at 15:26

Viewed 63 times

All Qt GUI apps crashes with Segmentation Fault but running well via debugging tools such gdb or strace. How its can be?

gdb ./doomseeker
strace ./doomseeker

Same is with Qbittorrent

and 2048-Qt

Only two Qt application starting normally - CMake GUI and Audacious Qt theme

PS https://unix.stackexchange.com/questions/735165/debian-sid-legacy-nvidia-340-108-driver-ruins-running-qt-software

edited Feb 15 '23 at 15:26

vimuth

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asked Feb 15 '23 at 12:50

Alexander Procenko

Weird. Can you generate a core dump on segfault and try to post-mortem debug it? I'd guess it's some library loading-related race condition, but that's just a guess. – alagner Feb 15 '23 at 21:19
BTW, I've seen your post on the other forum. What do you expect exactly? It's either a driver/kernel or QT bug. You can try fixing that yourself, but no easy fix exists I'm afraid. – alagner Feb 15 '23 at 21:29
Thanks. How get core dump on segfault? – Alexander Procenko Feb 15 '23 at 22:39
dmesg | grep segfault https://pastebin.com/raw/33yjKyxY – Alexander Procenko Feb 15 '23 at 22:46
As for [core dump on segfault](https://stackoverflow.com/questions/17965/how-to-generate-a-core-dump-in-linux-on-a-segmentation-fault) – alagner Feb 16 '23 at 00:06
and where is i can find coredump after segfault? or how to see it? – Alexander Procenko Feb 16 '23 at 00:58
I am on Devuan Ceres(SySv) I get SegFault without coredumped. – Alexander Procenko Feb 16 '23 at 01:09
Then it's setup differently, but it can be done. Why use Devuan anyway? I mean: your call, but using non-mainstream distro limits you in terms of support. – alagner Feb 16 '23 at 06:56
Previously i found this issue at Debian Sid and thought that Devuan have such problem but i am wrong. Here information that it happens from Qt 5.15.4 + comments https://unix.stackexchange.com/questions/735165/debian-sid-legacy-nvidia-340-108-driver-ruins-running-qt-software – Alexander Procenko Feb 16 '23 at 09:25
Is there any difference if you give GDB the command `set disable-randomization off` before `r` ? – Mark Plotnick Feb 19 '23 at 08:59
@Mark Plotnick starting normally as usual gdb without any options – Alexander Procenko Mar 02 '23 at 16:29

Qt application crashes at launch but running good via debbugging tools

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