Details
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Bug
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Resolution: Fixed
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P1: Critical
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5.15.8
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None
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MSYS2 MINGW64 and CLANG64
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Windows
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6259f4e7b (dev)
Description
In Qt 5.15.8 x64 in the MSYS2 dev environment a SEGFAULT happens when creating a QGuiApplication after calling QGuiApplication::setDesktopSettingsAware(false);
I'm able to reproduce this in both MINGW64 an CLANG64 environments.
Minimum code to reproduce:
#include <QGuiApplication> int main(int argc, char** argv){ QGuiApplication::setDesktopSettingsAware(false); QGuiApplication a(argc, argv); return a.exec(); }
Stack trace:
Process 11308 stopped * thread #1, stop reason = Exception 0xc0000005 encountered at address 0x7ffef941b650: Access violation reading location 0x00000000 frame #0: 0x00007ffef941b650 Qt5Gui.dll`QPalette::QPalette(QPalette const&) Qt5Gui.dll`QPalette::QPalette: -> 0x7ffef941b650 <+0>: movq (%rdx), %rax 0x7ffef941b653 <+3>: movq %rax, (%rcx) 0x7ffef941b656 <+6>: movl 0x8(%rdx), %edx 0x7ffef941b659 <+9>: movl %edx, 0x8(%rcx) (lldb) thread backtrace * thread #1, stop reason = Exception 0xc0000005 encountered at address 0x7ffef941b650: Access violation reading location 0x00000000 * frame #0: 0x00007ffef941b650 Qt5Gui.dll`QPalette::QPalette(QPalette const&) frame #1: 0x00007ffef93fad97 Qt5Gui.dll`QGuiApplicationPrivate::basePalette() const + 39 frame #2: 0x00007ffef93fac66 Qt5Gui.dll`QGuiApplicationPrivate::setPalette(QPalette const&) + 38 frame #3: 0x00007ffef93ef4db Qt5Gui.dll`QGuiApplicationPrivate::init() + 1947 frame #4: 0x00007ffef93eed15 Qt5Gui.dll`QGuiApplication::QGuiApplication(int&, char**, int) + 245 frame #5: 0x00007ff6922213d0 crash.exe`qMain(argc=1, argv=0x00000212dc0b4140) at main.cpp:6:5 frame #6: 0x00007ff6922221a0 crash.exe`WinMain + 272 frame #7: 0x00007ff6922214c8 crash.exe`main(argc=<unavailable>, argv=<unavailable>, envp=<unavailable>) at crtexewin.c:70:10 frame #8: 0x00007ff692221316 crash.exe`__tmainCRTStartup at crtexe.c:272:15 frame #9: 0x00007ff692221156 crash.exe`WinMainCRTStartup at crtexe.c:162:9 frame #10: 0x00007fff861726bd kernel32.dll`BaseThreadInitThunk + 29 frame #11: 0x00007fff87d2dfb8 ntdll.dll`RtlUserThreadStart + 40