515619 2026-02-06 13:58:23 +0000 Qt6: Fetching News crashes on Windows 2026-02-13 10:57:39 +0000 1 1 2 Applications krita General 6.0.0-beta1 Microsoft Windows Microsoft Windows RESOLVED FIXED regression NOR crash --- 0 penguinflyer2222 krita-bugs-null dimula73 halla 0 oldest_to_newest 2491895 0 penguinflyer2222 2026-02-06 13:58:23 +0000 SUMMARY The News widget crashes Krita on startup if fetching news is enabled. It only happens on Windows Qt6. From https://doc.qt.io/qt-6/qtimezone.html: > Note: When Qt is built with the ICU library, it is used in preference to the Windows system APIs, bypassing all problems with those APIs using different names. The backtrace shows this: > frame #17: 0x00007ffde81a80c2 Qt6Core.dll`QIcuTimeZonePrivate::data(long long) const + 130 > frame #18: 0x00007ffde819ed8f Qt6Core.dll`QTimeZonePrivate::displayName(long long, QTimeZone::NameType, QLocale const&) const + 79 > frame #19: 0x00007ffde819f20e Qt6Core.dll`QTimeZonePrivate::abbreviation(long long) const + 94 > frame #20: 0x00007ffde81a812d Qt6Core.dll`QIcuTimeZonePrivate::data(long long) const + 237 > ... (looping) > frame #7074: 0x00007ffde819ed8f Qt6Core.dll`QTimeZonePrivate::displayName(long long, QTimeZone::NameType, QLocale const&) const + 79 > frame #7075: 0x00007ffde819f20e Qt6Core.dll`QTimeZonePrivate::abbreviation(long long) const + 94 > frame #7076: 0x00007ffde81a812d Qt6Core.dll`QIcuTimeZonePrivate::data(long long) const + 237 It appears to be a Qt bug fixed by the change "Avoid infinite recurision in time-zone abbreviation look-up with ICU" https://codereview.qt-project.org/c/qt/qtbase/+/596973/3 Which is in 6.8.3 (35a82236) and 6.9.2 (f38c0fd3). STEPS TO REPRODUCE Open Krita with News enabled. OBSERVED RESULT Crashes on loading main window. EXPECTED RESULT Doesn't crash, shows news. SOFTWARE/OS VERSIONS Krita 6.0.0-beta1 (per K-A; the backtrace is from a build around March 2025, but should be the same.) ADDITIONAL INFORMATION 2492321 1 halla 2026-02-07 21:03:01 +0000 So it's an upstream bug that we can fix by building with a different version of Qt, right? 2492488 2 penguinflyer2222 2026-02-08 15:36:50 +0000 Yes, it should be fixable by updating Qt (in theory it should be safe to update to 6.8.3...), or just backporting the few-lines patch to our current Qt until we manage to fix issues with 6.9+. 2493484 3 dimula73 2026-02-11 10:50:35 +0000 Git commit 05a047196fb798550cc4536aca525711f5b574fd by Dmitry Kazakov. Committed on 11/02/2026 at 10:50. Pushed by dkazakov into branch 'transition.now/qt6'. [ext_qt] Fix the crash when Krita tries to fetch news on Qt6 A cherry-pick of this upstream patch: https://codereview.qt-project.org/c/qt/qtbase/+/597083 M +1 -1 ext_qt/CMakeLists.txt https://invent.kde.org/packaging/krita-deps-management/-/commit/05a047196fb798550cc4536aca525711f5b574fd 2494102 4 dimula73 2026-02-12 15:59:28 +0000 Hi, Freya! Could you please check the latest nightly if you still have a crash for it? I have cherry-picked the Qt patch into our build of Qt, so this build should have it now. https://origin.cdn.kde.org/ci-builds/graphics/krita/krita-6.0/windows/ 2494155 5 penguinflyer2222 2026-02-12 18:50:06 +0000 Yes, the News works fine in 6.0.1-prealpha-0ee42d29. 2494350 6 dimula73 2026-02-13 10:57:39 +0000 Thanks a lot for testing! :)