Hi, I've started looking at transitioning Octave from Qt 4 to Qt 5. I get a successful build running under sbuild, but I often get a SIGABRT or SIGSEGV during the test stage when building in place outside of sbuild. After installing the debs from sbuild, I get the same SIGABRT sometimes when running octave under xvfb-run manually. Or often a SIGSEGV when running the tests in libinterp/corefcn/graphics.cc-tst under xvfb-run. I don't see any of this with Octave 4.2.1-2 built with Qt 4. The other known issue I'm aware of is that OpenGL plotting doesn't render under Xwayland with Qt 5 (possibly depending on the graphics adapter), but does seem to continue working with Qt 4. So maybe we should be conservative for now and stay with Qt 4. -- mike
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