kernel: shotcut[] segfault at 54a8 ip 000071d51a2205a0 sp 00007ffd98100198 error 4 in libQt6Gui.so.6.10.2

Shotcut was installed from the official debian repo. When shotcut is started, it crashes with a segfault:

Here's the log when shotcut is executed in a terminal:
https://pastebin.com/raw/2U2xk5j9

Here's the coredumpctl gdb (and bt + thread apply all bt inside gdb prompt)
https://pastebin.com/raw/SmEyvwPa

Not sure if this is related to #1886, but exporting QSG_RHI_BACKEND=vulkan or setting opengl=5 in ~/.config/Meltytech/Shotcut.conf don't change anything.

If you need any other info, just paste a command and I'll provide you with its output.

OS & shotcut info:

$ uname -a
Linux morfikownia 7.1.10-amd64 #6 SMP PREEMPT_DYNAMIC Wed Aug 26 13:11:52 CEST 2026 x86_64 GNU/Linux

$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux forky/sid"
NAME="Debian GNU/Linux"
VERSION_CODENAME=forky
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

$ apt-cache policy shotcut
shotcut:
  Installed: 26.8.1+ds-1
  Candidate: 26.8.1+ds-1
  Version table:
 *** 26.8.1+ds-1 990
        500 https://deb.debian.org/debian testing/main amd64 Packages
        990 https://deb.debian.org/debian sid/main amd64 Packages
        100 /var/lib/dpkg/status

Start by reproducing the startup crash with Shotcut 26.8.1+ds-1 on Debian testing or sid, then inspect the terminal log and coredumpctl gdb output linked in the report. Compare the backtrace around libQt6Gui.so.6.10.2 with issue #1886 and test the reported Vulkan and OpenGL configuration changes. Done means the cause is identified and the startup crash is prevented or clearly narrowed down.