program stops at "QAüülication a(argc, *argv[])

rhnulm

Rebooted PC (Debian)
Updated Qt
Created program skeleton by "Create project"
Started compilation: no errors
Started Project & Debug -> program stops at "QApplication a(argc, *argv[])
Older programs which ran properly, before, also stop there.
I am perplexed and clueless???

SGaist

Hi and welcome to devnet,

You should start your application using the debugger to see what happens.

Pl45m4

@rhnulm said in program stops at "QAüülication a(argc, *argv[]):

Started Project & Debug -> program stops at "QApplication a(argc, *argv[])

If it really stops there, do you pass any args to your program?
Is Qt installed/updated properly?

JonB

@rhnulm said in program stops at "QAüülication a(argc, *argv[]):

Started Project & Debug -> program stops at "QApplication a(argc, *argv[])

What exactly does "stops at" mean, what do you see?

Does this also happen if run directly in gdb without Creator?

And how does it behave if run directly, no debugger/IDE?

Also reboot after updating Qt :)

rhnulm

I have

a brandnew installation of debian 11
a brandnew installation of qt creator (qt 6.5), nothing else installed, so far, exept the Qt preconditions
a brandnew widget project (using "create project")
I do not pass any cmdline arguments (exept the command itself arg[0])
I start the program using the debugger
still it stops at the "QApplication a(argc, *argv[]) with the abort signal SIGABRT

rhnulm

New behavior:
after re-booting

started QtCreator
clicked create project
selected Qt Widget Application
clicked 'continue' 5 times
-selected 'Desktop Qt 6.5.0 GCC 64bit'
clicked 'finish' => Skeleton was created
clicked 'Start Project & Debug'
Program stopped 'SIGABRT' but now in "qglobal.cpp" here (see end of function):
void qAbort()
{
#ifdef Q_OS_WIN
// std::abort() in the MSVC runtime will call _exit(3) if the abort
// behavior is _WRITE_ABORT_MSG - see also _set_abort_behavior(). This is
// the default for a debug-mode build of the runtime. Worse, MinGW's
// std::abort() implementation (in msvcrt.dll) is basically a call to
// _exit(3) too. Unfortunately, _exit() and _Exit() do run the static
// destructors of objects in DLLs, a violation of the C++ standard (see
// [support.start.term]). So we bypass std::abort() and directly
// terminate the application.

if defined(Q_CC_MSVC)

if (IsProcessorFeaturePresent(PF_FASTFAIL_AVAILABLE))
    __fastfail(FAST_FAIL_FATAL_APP_EXIT);

else

RaiseFailFastException(nullptr, nullptr, 0);

endif

// Fallback
TerminateProcess(GetCurrentProcess(), STATUS_FATAL_APP_EXIT);

// Tell the compiler the application has stopped.
Q_UNREACHABLE_IMPL();

#else // !Q_OS_WIN
==> std::abort(); <==
#endif
}

jsulm

@rhnulm Can you post stack trace after crash?

rhnulm

Hi all and thanks a lot!
After, again, installing from scratch Debian and the QtCreator it seems to run :-) No idea why but, at least, the pure widget program skeleton (Create Project) runs and shows the empty window :-)
Thanks again!