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  1. Qt for Python
  2. PYSIDE-79

Segfault when using connect

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Details

    • Bug
    • Resolution: Fixed
    • P2: Important
    • 6.0, 6.5.0, 6.4.3
    • 1.2.x
    • PySide
    • None
    • db40e3e07 (dev), d00d4bfc6 (6.4), 08ec50ff3 (dev), 9c5b9a97e (6.4), 21fbc5ec9 (dev), 30614ffb1 (6.4), d074f98de (dev), 2fee56b74 (6.4)

    Description

      Python segfaults when connecting to a signal attribute of a temporary object; e.g.

      tv = QTreeView()
      ...
      tv.selectionModel().destroyed.connect(callback)

      What happens is a PyObject* is created for the selection model, but is destroyed after its 'destroyed' attribute is gotten and before the .connect(callback) call.

      It may not segfault in a non-debug python build because the recently freed memory may still contain its old values

      Attachments

        1. bug_79.py
          2 kB
        2. ceval.c
          139 kB
        3. instrumentation.txt
          0.3 kB
        4. object.c
          58 kB
        5. object.h
          38 kB
        6. pyside79_5.py
          0.8 kB
        7. pyside79_pyqt.py
          1 kB
        8. pyside79.py
          1 kB
        9. signalconnect_test.py
          0.5 kB

        Issue Links

          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-161 Crash on connect to currentRowChanged slot

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2201 Segfault when calling signal of temporary

          • P4: Low - Would be nice to fix, but it's not very important.
          • Closed
          resulted in

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-1057 QNetworkReply leak

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open
          For Gerrit Dashboard: PYSIDE-79
          # Subject Branch Project Status CR V
          610386,31 WIP: Fix a memory leak connecting to signals dev pyside/pyside-setup Status: NEW -2 0
          611544,2 WIP: Reduce number of weakref for signal source tracking dev pyside/pyside-setup Status: NEW -2 0
          611573,1 WIP: Fix a memory leak connecting to signals, take 2 dev pyside/pyside-setup Status: NEW -2 0

          Activity

            People

              ctismer Christian Tismer
              jpe John Ehresman
              Votes:
              6 Vote for this issue
              Watchers:
              19 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are 3 open Gerrit changes