[3.15] gh-150387: Fix hang in test_run_failed_script_live on slow buildbots (GH-150405) (#150420)

Author: miss-islington

Lib/test/test_profiling/test_sampling_profiler/test_live_collector_ui.py

@@ -835,8 +835,7 @@ def mock_init_curses_side_effect(self, n_times, mock_self, stdscr):
         # still failing
         for _ in range(n_times):
             mock_self.display.simulate_input(-1)
-        if n_times >= 500:
-            mock_self.display.simulate_input(ord('q'))
+        mock_self.display.simulate_input(ord('q'))
 
     def test_run_failed_module_live(self):
         """Test that running a existing module that fails exits with clean error."""

Misc/NEWS.d/next/Tests/2026-05-25-15-39-53.gh-issue-150387.yzZ7jq.rst

@@ -0,0 +1,5 @@
+Fix hang in
+``test.test_profiling.test_sampling_profiler.test_live_collector_ui.TestLiveModeErrors.test_run_failed_script_live``
+on slow buildbots. The test now always queues a final ``q`` keystroke so the
+live TUI loop exits even when the profiler collects enough samples to enter
+the post-finished input loop.