Saturday, 2021-07-31

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jhofsteeQt4 (old, I know) compiled with the (almost) latest master (g++ 11.1) has a fancy issue. While a QApplication can be constructed and used, the program will fail with "QPixmap: Must construct a QApplication before a QPaintDevice" if QCoreApplication::instance() is called afterwards.13:24
jhofsteeDoes someone have any idea how such a getter, static QCoreApplication *instance() { return self; } can cause such a problem?13:25
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mruin c++, anything can be a problem15:07
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jhofsteemru: thanks, yes it is asking for problems, compiling old c++ code with a brand new compiler, I am aware of that. Checking with g++ 11.2 now, 3 days old ;)15:23
mruI suspect that any non-trivial c++ program works only by accident, relying on specific quirks of whatever compiler was current when it was written15:25
jhofsteemru: this seems rather trivial, instance() just returns a static member, it _seems_ if there are two copies of it for some reason..15:44
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