Details
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Bug
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Resolution: Fixed
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P1: Critical
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6.11.0 FF
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None
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Debian testing, qtbase self-compiled from git dev as of commit e0130876ba376faf681b80d4a7dbb20a5e3c3bdb
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Linux/Wayland
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99ad6a51a (dev), 5380da9cc (6.10), 4316e9a67 (dev), b703da388 (6.10)
Description
This report is based on an earlier discussion in the KDE a11y matrix room.
When trying to retrieve all properties for one of the AT-SPI interfaces using the "GetAll" method of the "org.freedesktop.DBus.Properties" interface, this results in the Qt app that gets queried to crash.
Sample steps to reproduce:
1) Run the qtbase spinboxes example:
$ ./examples/widgets/widgets/spinboxes/spinboxes
2) Identify the AT-SPI bus address to use in the next commands:
$ busctl --user call org.a11y.Bus /org/a11y/bus org.a11y.Bus GetAddress
s "unix:path=/run/user/1000/at-spi/bus_1,guid=e4226c4804daa306ae987158683e6ebf"
3) Identify bus name for the spinboxes app:
$ busctl --address="unix:path=/run/user/1000/at-spi/bus_1,guid=e4226c4804daa306ae987158683e6ebf" list | grep spinboxes
:1.91 2188539 spinboxes michi :1.91 user@1000.service - -
4) Query available interfaces of the root object:
$ busctl call --address="unix:path=/run/user/1000/at-spi/bus_1,guid=e4226c4804daa306ae987158683e6ebf" ':1.91' '/org/a11y/atspi/accessible/root' 'org.a11y.atspi.Accessible' 'GetInterfaces' as 2 "org.a11y.atspi.Accessible" "org.a11y.atspi.Application"
5) Call the GetProperties method for the Application interface:
$ busctl call --address="unix:path=/run/user/1000/at-spi/bus_1,guid=e4226c4804daa306ae987158683e6ebf" ':1.91' '/org/a11y/atspi/accessible/root' 'org.freedesktop.DBus.Properties' 'GetAll' 's' 'org.a11y.atspi.Application' Call failed: Message recipient disconnected from message bus without replying
Actual Result:
No properties are returned, but the app crashes with this on stderr:
ASSERT failure in QList::at: "index out of range", file /home/michi/development/git/qt5/qtbase/src/corelib/tools/qlist.h, line 505
Aborted (core dumped)