Public bug reported:

ProblemType: Crash
DistroRelease: Ubuntu Kylin 25.10
LiveMediaBuild: Ubuntu-Kylin 25.10 "Questing Quokka" - Daily amd64 (20250909)
ProcVersionSignature: Ubuntu 6.17.0-3.3-generic 6.17.0-rc3
Package: ukui-menu 3.03-1build4

What happened: 
    ukui-menu crashes (segfault) immediately after switching language format of 
date, time, and currency format to English in a UKUI session on a live session 
of Ubuntu.

What I expected: 
    ukui-menu should remain stable when changing input language/layout.

Scope: 
    Reproduced both on QEMU/KVM VM and on live USB on physical hardware (HP 
Envy x360 Convertible 13m-bd0xxx, i7-1165G7, Iris Xe).

Reproducibility: 
    Always.

Steps to reproduce:

    Boot Ubuntu Kylin live session from USB or in QEMU/KVM.
    Open the settings and switch language for the time/date format from 
Simplified Chinese to English.
    Observe ukui-menu segfaults and restarts/disappears.

SegvAnalysis:
    Segfault happened at: 0x797653138d18 <_ZN10QboxLayoutD2Ev+440>:   call 
*0x(%rax)
    PC (0x797653138d18) ok
    source "*0x8(%rax)" ok
    destination "%rsp)" (0x7ffc13b0aba0) ok
    SP (0x7ffc13b0aba0) ok
    Reason could not be automatically determined

Signal:
    11

SignalName:
    SIGSEGV

journalctl log:
9月 10 22:22:02 ubuntu-kylin kernel: ukui-menu[2412]: segfault at 5d946f7c67fe 
ip 0000797653138d18 sp 00007ffc13b0aba0 error 4 in libQt5W46f7c67fe ip 
0000797653138d18 sp 00007ffc13b0aba0 error 4 in 
libQt5Widgets.so.5.15.17[182d18,797653104000+406000] likely on CPU 1 (core 0, 
socket 1)

I have attached _usr_bin_ukui-menu.1000.crash for analysis

** Affects: ukui-menu (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: ".crash file"
   
https://bugs.launchpad.net/bugs/2122547/+attachment/5908331/+files/_usr_bin_ukui-menu.1000.crash

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https://bugs.launchpad.net/bugs/2122547

Title:
  ukui-menu crashed with SIGSEV in QBoxLayout::~QBoxLayout()

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