Hello,
Yeah, it's possible that some metatype (used in signal) is registered in
Qt 5.12 and is NOT registered in Qt 5.15, thus connection does not work
between objects in different threads.
It's required to register it manually then.
On 9/26/2020 12:31 AM, Harri Porten wrote:
Hello Rainer,
On Thu, 24 Sep 2020, Rainer Wiesenfarth wrote:
I have a strange problem that for a certain queued signal/slot
connection the signal is emitted, but the event does not reach the
connected slot. This problem is reproducible in Qt 5.15.0, but does
not occur in Qt 5.12.5. Unfortunately, the simple test program (see
attached file) does not show the behavior.
Last time I saw something like this happening the bug was sought in
Qt. But then found in the application :)
One of the QObjects lived in the wrong thread. Printing and comparing
of QObject::thread() pointers helped to identify and fix the problem.
A missing QObject::moveToThread() call iirc.
Harri.
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