[Libreoffice-bugs] [Bug 138417] New: Crash when customizing sidebar tab bar in Writer

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=138417

            Bug ID: 138417
           Summary: Crash when customizing sidebar tab bar in Writer
           Product: LibreOffice
           Version: 7.1.0.0.alpha1+
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: raykowj at gmail.com

Created attachment 167485
  --> https://bugs.documentfoundation.org/attachment.cgi?id=167485&action=edit
backtrace of crash

Steps to repro:

1) Open Writer
2) Menu > View > Sidebar
3) Sidebar Menu button > Customization
4) Select any deck other than the open deck

Results: crash

Version: 7.1.0.0.alpha1+
Build ID: 37fb6b5faa56c68c5d4dc61ee2eaafc828bf9939
CPU threads: 4; OS: Linux 5.4; UI render: default; VCL: x11
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded

Attached is a backtrace of the crash. In patch[1] to provide keyboard
navigation using guidelines for keyboard navigation in the sidebar[2]
maButtons.clear is used in FocusManager::ClearButtons() versus looping through
the buttons and unregister the connected key press handler. This doesn't crash
but I am unsure if it is a good fix or not.

[1]
https://design.blog.documentfoundation.org/2017/02/16/guidelines-for-keyboard-navigation-in-the-sidebar/
[2] https://gerrit.libreoffice.org/c/core/+/106215

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