Application: kcalc (20.12.3)
 (Compiled from sources)
Qt Version: 5.15.2
Frameworks Version: 5.79.0
Operating System: Linux 5.11.3-gentoo x86_64
Windowing System: X11
Drkonqi Version: 5.21.2
Distribution: "Gentoo Base System release 2.7"

-- Information about the crash:
- What I was doing when the application crashed:

Executed a rigged kcalc to get a DrKonqi window.

- Custom settings of the application:

I modified kcalc source code for it to segfault on startup.

The crash can be reproduced every time.

-- Backtrace:
Application: KCalc (kcalc), signal: Segmentation fault
Content of s_kcrashErrorMessage: [Current thread is 1 (Thread 0x7f7411f52b40 (LWP 2116598))]
[KCrash Handler]
#6  QButtonGroup::setExclusive (this=0x69002f00650072, exclusive=exclusive@entry=true) at /var/tmp/portage/dev-qt/qtwidgets-5.15.2/work/qtbase-everywhere-src-5.15.2/src/widgets/widgets/qbuttongroup.cpp:148
#7  0x00007f741736c584 in KCalculator::KCalculator (this=0x561bf6b9e7c0, parent=<optimized out>, __in_chrg=<optimized out>, __vtt_parm=<optimized out>) at /var/tmp/portage/kde-apps/kcalc-20.12.3/work/kcalc-20.12.3/kcalc.cpp:105
#8  0x00007f741736d54d in kdemain (argc=<optimized out>, argv=<optimized out>) at /var/tmp/portage/kde-apps/kcalc-20.12.3/work/kcalc-20.12.3/kcalc.cpp:2434
#9  0x00007f7417197dba in __libc_start_main (main=0x561bf4cde050 <main>, argc=1, argv=0x7ffd53701118, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd53701108) at ../csu/libc-start.c:314
#10 0x0000561bf4cde08a in _start ()
[Inferior 1 (process 2116598) detached]

Possible duplicates by query: bug 433533, bug 423951, bug 421576, bug 420134, bug 419798.

Reported using DrKonqi