fix: prevent sefaults after progress bar tasks (#1490)

src/tagstudio/qt/utils/custom_runnable.py

@@ -2,17 +2,23 @@
 # SPDX-License-Identifier: GPL-3.0-only
 
 
+from collections.abc import Callable
+from typing import override
+
 from PySide6.QtCore import QObject, QRunnable, Signal
 
 
 class CustomRunnable(QRunnable, QObject):  # pyright: ignore[reportUnsafeMultipleInheritance]
     done = Signal()
 
-    def __init__(self, function) -> None:
+    def __init__(self, function: Callable[..., None]) -> None:
         QRunnable.__init__(self)
         QObject.__init__(self)
+        self.setAutoDelete(False)
         self.function = function
 
+    @override
     def run(self):
         self.function()
         self.done.emit()
+        self.deleteLater()