Prevent SEGFAULT when runtests.py exits

Disconnect all signal-slots connections of the main QThread just before
runtests.py exits. This prevents a SEGFAULT when the finished signal of
the main QThread is triggered. This is an issue in the PyQt6 bindings
(PySide6 is also affected).

Author: rear1019

Diff for: runtests.py

@@ -21,6 +21,8 @@
 # Don't remove it or change it to a different location!
 # pylint: disable=wrong-import-position
 from qtpy import QtWebEngineWidgets  # noqa
+
+from qtpy.QtCore import QThread
 import pytest
 
 
@@ -59,6 +61,15 @@ def run_pytest(run_slow=False, extra_args=None, remoteclient=False):
     print("Pytest Arguments: " + str(pytest_args))
     errno = pytest.main(pytest_args)
 
+    # Disconnect all signal-slots connection of the main QThread just before
+    # runtests.py exits. This prevents a SEGFAULT when the finished signal of
+    # the main QThread is triggered. This is an issue in the PyQt6 bindings
+    # (PySide6 is also affected).
+    try:
+        QThread.currentThread().disconnect()
+    except TypeError:  # raised when no signals are connected
+        pass
+
     # sys.exit doesn't work here because some things could be running in the
     # background (e.g. closing the main window) when this point is reached.
     # If that's the case, sys.exit doesn't stop the script as you would expect.