[Solved] Crash in release mode

Joel Bodenmann

I have a larger application built using Qt 5.4. It works very well in debug mode. However, when running the version compiled with the release mode the application crashes once I click an icon in my QToolBar:

DBusMenuExporterPrivate::addAction(): Already tracking Action XXX under id YYY

Can anyone give me a hint how to debug this? In release mode I don't have the debugging symbols available so the debugger doesn't help me at all.
I create an action and add it to a QMenu and the QToolBar. I assume that this is not a problem because that is how QActions are supposed to be used, right?

Anyway, I would be thankful for any hint. Google didn't help much and I cannot debug this.

bnogal

try these flags in your qmake:

QMAKE_CXXFLAGS_RELEASE = $$QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO
QMAKE_LFLAGS_RELEASE = $$QMAKE_LFLAGS_RELEASE_WITH_DEBUGINFO

if it is not enough, build your app on linux and use valgrind.

Joel Bodenmann

Thank you, these macros are very helpful.

The error turned out to be that I did: Q_ASSERT(_activeProject->open()); without knowing that Q_ASSERT() has no effect in Release mode (when QT_NO_DEBUG IS TRUE).
The error message I got (the one I stated in my first post) was therefore completely unrelated to this issue.

Thank you for the help!

SGaist

Hi,

Q_ASSERT follows the same rules as assert that's why it doesn't do anything in release mode. A rule of thumb is to always check the returned value and not the function itself

Joel Bodenmann

@SGaist Thank you for the advice. This is definitely a rule I will always follow from now on :)