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Tor Arne Vestbø abb985a403 macOS: Fix crash when re-using backingstore for re-created QWindow 
The observer we add for the NSWindow of the backingstore window
will not be valid once that window is destroyed, but we may get
last minute notifications for it still, in which case our platform
window is gone.

This patch fixes the immediate crash, but reveals a more fundamental
problem of assuming the platform window that's alive during construction
is the one that will always be used with the backingstore. This is not
the case when for example QtWidgets opens a combo box, and reuses the
backingstore for the widget each time the combobox popup is shown.

Fixes: QTBUG-85915
Pick-to: 5.15
Pick-to: 5.12
Change-Id: Ia66a45d003882602ac29476aabf2d58b0ac33c1e
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
2020-08-07 12:01:22 +02:00
.github/workflows Update configure flags to the last fixes 2020-06-30 15:21:32 +02:00
bin Add OS-specific prelude to qt-cmake-standalone-test 2020-07-15 15:13:05 +00:00
cmake configure: Explicitly enable float-divide-by-zero with ubsan 2020-08-07 01:21:07 +02:00
coin CMake: Use CMAKE_AUTOGEN_VERBOSE to see moc invocations 2020-07-24 17:33:17 +02:00
config.tests CMake: Skip regeneration of manual compile test project 2020-04-09 11:26:46 +02:00
dist Remove last remainings of Qt Quick 1 imports 2020-05-25 11:48:12 +02:00
doc Fix return of uninitialized pointer in guiloader example 2020-07-16 21:52:26 +02:00
examples Long Live QMap as a refcounted std::map! 2020-08-06 19:15:39 +02:00
lib Purge all fonts 2015-08-18 19:59:14 +00:00
mkspecs configure: Explicitly enable float-divide-by-zero with ubsan 2020-08-07 01:21:07 +02:00
qmake Long Live QMap as a refcounted std::map! 2020-08-06 19:15:39 +02:00
src macOS: Fix crash when re-using backingstore for re-created QWindow 2020-08-07 12:01:22 +02:00
tests QDecompressHelper: Add brotli support 2020-08-06 20:56:42 +02:00
util QDecompressHelper: Add brotli support 2020-08-06 20:56:42 +02:00
.cmake.conf pro2cmake.py: Generate .cmake.conf files for versioning 2020-04-30 17:44:03 +00:00
.gitattributes Update the git-archive export options 2012-09-07 15:39:31 +02:00
.gitignore git: Ignore CMakeLists.txt.user 2020-07-24 17:26:51 +02:00
.lgtm.yml Skip LGTM analysis for the bootstrap library and tools 2020-07-16 01:04:34 +02:00
.qmake.conf Bump version 2019-12-17 12:41:31 +01:00
.tag Update the git-archive export options 2012-09-07 15:39:31 +02:00
CMakeLists.txt CMake: Protect against Qt toolchain file recursive inclusion 2020-06-04 23:21:27 +02:00
config_help.txt Make -qtlibinfix affect the names of plugins by default 2020-07-13 20:30:18 +02:00
configure CMake: Fix top-level configure 2020-07-16 15:00:37 +02:00
configure.bat CMake: Fix top-level configure 2020-07-16 15:00:37 +02:00
configure.cmake Make -qtlibinfix affect the names of plugins by default 2020-07-13 20:30:18 +02:00
configure.json Make -qtlibinfix affect the names of plugins by default 2020-07-13 20:30:18 +02:00
configure.pri Treat -xplatform or -device-option as being a cross compilation 2020-07-08 19:18:09 +02:00
dependencies.yaml Re-add dependencies.yaml so repos outside qt5 can be built with Coin 2019-09-19 17:07:36 +00:00
header.BSD Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.FDL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.GPL-EXCEPT Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL3-COMM Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-NOGPL2 Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.LGPL-ONLY Use placeholder for year in header.* files 2018-04-16 11:02:22 +00:00
header.MIT qsimd: add support for new x86 CPU features 2018-05-05 06:20:07 +00:00
INSTALL INSTALL: Remove outdated reference to Windows CE 2019-02-13 13:01:57 +00:00
LICENSE.FDL Initial import from the monolithic Qt. 2011-04-27 12:05:43 +02:00
LICENSE.GPL2 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.GPL3-EXCEPT Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPL3 Add new license header templates and license files 2016-01-14 20:43:46 +00:00
LICENSE.LGPLv3 Remove LICENSE.GPLv3, LICENSE.LGPLv21, LGPL_EXCEPTION.txt 2018-04-16 11:02:14 +00:00
LICENSE.QT-LICENSE-AGREEMENT Update enterprise license agreement v4.2.1 2019-12-18 13:07:19 +02:00
qtbase.pro nuke configure -host-option 2016-12-13 18:55:59 +00:00
sync.profile Remove last remaining bits of QtPlatformHeaders 2020-08-04 07:12:32 +02:00