The QEventLoop object, event_loop, created in IPython/terminal/pt_intputhooks/qt.py L58 is not deleted when exiting the scope as passing app to the constructor parents the object to app. This creates a memory leak as QEventLoop objects are being accumulated.

The issue was originally reported by @pag who also suggested the fix.

pytest IPython/terminal/tests/ runs through without errors. I have tested the changes and see no more accumulation of QEventLoop objects.

This fixes #14240