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Bug
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    Resolution: Cannot Reproduce
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P3: Somewhat important
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    6.1.0 Beta3
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    None
 
After running the test for a few frames this assertion is hit:
ASSERT: "mask.width() <= c.w && mask.height() <= c.h" in file /home/jonas/Coding/qt5/qtbase/src/gui/painting/qtextureglyphcache.cpp, line 340