test_wait_signal.py::test_destroyed and PySide

[rth]

The test_wait_signal.py::test_destroyed is currently skipped on PySide, with the mention,

For some reason, this crashes PySide although it seems perfectly fine code.

There was an attempt to fix it in https://github.com/pytest-dev/pytest-qt/pull/161/files#diff-173c0eb872f447927c67f875c09b7ba4 that was removed from the superseding PR as that was still producing segfauts with PySide.

Just opening this issue for future reference in case someone looks into this in the future..

[nicoddemus]

Thanks!