[Development] Help debugging "impossible condition"
Thiago Macieira
thiago.macieira at intel.com
Sat May 5 22:18:20 CEST 2012
One of my tasks was to clean up QEvent. I have done mostly so, but I wanted to
go one step further and put a warning to anyone (ab)using the QEvent d-
pointer. That's change
https://codereview.qt-project.org/#change,24994
Unfortunately, I've hit a snag and I need help. Somehow, something is setting
the d pointer in one or both QEvents created on the stack in
QApplicationPrivate::dispatchEnterLeave, causing my change to crash in
tst_graphicsview:hoverLeave.
I can't reproduce it. On my system, the crash doesn't happen. In fact, the
function in question isn't called at all. And the test fails -- which might be
related.
So I need help. Can anyone:
a) help me make the test pass and, in the process, crash for me?
or
b) debug the issue? I suggest putting a breakpoint in
QApplicationPrivate::dispatchEnterLeave, then a watchpoint in those QEvent's
d-pointers and see where they get changed. A full fix would be nice, but I'll
settle for the location of where the d pointer is set.
--
Thiago Macieira - thiago.macieira (AT) intel.com
Software Architect - Intel Open Source Technology Center
Intel Sweden AB - Registration Number: 556189-6027
Knarrarnäsgatan 15, 164 40 Kista, Stockholm, Sweden
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