From Getting the stack trace in Getting stacktraces on crashes | qutebrowser:

$ gdb -ex r --args $(readlink -f $(which python3)) -m qutebrowser --debug --temp-basedir

Result:

…
Thread 1 "python3.14" received signal SIGSEGV, Segmentation fault.
0x00007fffd5d4446c in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
(gdb) bt
#0  0x00007fffd5d4446c in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
#1  0x00007fffd4cb839d in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
#2  0x00007fffd4ca3ea8 in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
#3  0x00007fffd4f6a19f in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
#4  0x00007fffd4f6b10f in ?? () from /usr/lib/x86_64-linux-gnu/libgallium-26.0.3-1ubuntu1.so
#5  0x00007fffe3409a90 in ?? () from /usr/lib/x86_64-linux-gnu/libQt6WebEngineCore.so.6
#6  0x0000000000000000 in ?? ()
(gdb) q
…