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  1. Qt for Python
  2. PYSIDE-2141

Crash when connecting/disconnecting inherited slot

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Details

    • Bug
    • Resolution: Fixed
    • Not Evaluated
    • 6.5.0
    • 6.3.1, 6.4.1
    • PySide
    • None
    • Python 3.8
      Qt 6.4.1 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2019) [limited API]
    • Windows
    • 1270a9e82e5bc3bd53a1131698ece60403da1192, 15ccf2484 (dev), e42f576bf (6.4), cec835ba1 (tqtc/lts-6.2), 46ab90a5f (dev), afffc5838 (6.5), 9529690b4 (dev), 1d429a7b5 (6.7), eaff347f5 (6.6), c777151d2 (tqtc/lts-6.5), 279658b85 (dev), 66a58efd8 (6.7)

    Description

      Program crashes with an "access violation" error when running the attached script:

      Python 3.8
Qt 6.4.1 (x86_64-little_endian-llp64 shared (dynamic) release build; by MSVC 2019) [limited API]
Windows fatal exception: access violation

Current thread 0x00002388 (most recent call first):
  File ".\testthreads.py", line 32 in <module>

      If the script is changed so that `obj = A()` instead of `obj = B()`, the crash does not occur.

      This also occurs if the `c` object is used (for example emitting the signal), as long as the operation is not blocking (in our case it emits a queued signal) or the target thread is congested.

      Linux

      Out of memory  in QtCore/qarraydatapointer.h, line 215

      Attachments

        1. pyside214_cpp.zip
          1 kB
        2. pyside2141_diag.diff
          3 kB
        3. pyside2141_log.txt
          1 kB
        4. pyside2141_stack.txt
          35 kB
        5. pyside2141_valgrind.txt
          903 kB
        6. pyside2141.py
          1 kB
        7. testthreads.py
          0.6 kB

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2646 [REG: 6.2->6.5] Connections to lambda or nested function prevent destruction of objects they refer to

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Closed
          resulted in

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2299 REG->6.5: Memory/Reference Leak with connecting signals to lambda functions referencing "self"

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

          Bug - A problem which impairs or prevents the functions of the product. PYSIDE-2371 REG->6.5: Memory leak connecting signal to local function

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

            People

              kleint Friedemann Kleint
              matsjoyce-refeyn Matthew Joyce
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              Dates

                Created:
                Updated:
                Resolved: