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  1. Qt
  2. QTBUG-40975

Crash when mouse is removed while handling mouse input

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Details

    • Bug
    • Resolution: Duplicate
    • P2: Important
    • None
    • 5.3.1
    • QPA: X11/XCB
    • None
    • Arch linux x86_64
      Qt 5.3.1 and git dev branch built with GCC 4.9.1
      libxcb 1.11
      xorg-server 1.16

    Description

      I've managed to cause a segfault in Qt-based applications by removing my USB mouse while it's input is being handled, such as text selection or drag-and-drop movement.

      I have reproduced this on Qt Creator and my own Qt-based app with Qt 5.3.1, and then on
      Qt Designer from a freshly built git dev branch (attached stack trace is from Designer).
      Please note that this does not reproduce right away and may take a few mouse removals.

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          is replaced by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40820 Crash in QXcbConnection::deviceForId

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; Flaky tests; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
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              allan.jensen Allan Sandfeld Jensen
              age Evgeny Grablyk
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              Dates

                Created:
                Updated:
                Resolved:

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