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  1. Qt
  2. QTBUG-53947

QCocoaEventDispatcher may stay stuck after QEventLoop::exit() is called

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Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.6.3
    • 5.6.1
    • Core: Event loop
    • None
    • OS X
    • 9ab60b9c0db453fb598e42d91ce3217944afd9b6

    Description

      Since QCocoaEventDispatcher::processEvents() resets the interrupt state, this may prevent a higher level event loop from returning.

      For example, calling Menu::exec() and, as a result of an action being triggered, the application calls QCoreApplication::processEvents() after QMenu::hideEvent(). In this case, the menu event loop can be stuck until we run another event loop.

      See attached example. Click the button and wait until "Done looping" is printed (As things are, it won't until you exit the app).

      Attachments

        1. untitled8.zip
          3 kB
          Gabriel de Dietrich (drgvond)

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-55725 ProcessEvents hang

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-55082 [macOS]: When calling processEvents() after calling accept() on a QDialog then it will get stuck inside the dialog's event loop

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-49539 QThread::quit() does not work on OS X.

          • 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; 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
          For Gerrit Dashboard: QTBUG-53947
          # Subject Branch Project Status CR V
          161913,2 QCocoaEventDispatcher: Save interrupt state between embedded calls 5.6 qt/qtbase Status: MERGED +2 0
          173324,1 QCocoaEventDispatcher: Save interrupt state between embedded calls dev qt/qtbase Status: ABANDONED 0 0

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            People

              dedietri Gabriel de Dietrich (drgvond)
              dedietri Gabriel de Dietrich (drgvond)
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              Dates

                Created:
                Updated:
                Resolved:

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