[do not merge] Debug slow tasks tests

tests/integrations/rq/conftest.py

@@ -0,0 +1,20 @@
+import faulthandler
+import tempfile
+
+import pytest
+
+
+@pytest.fixture(autouse=True)
+def _dump_stacks_if_slow(request):
+    # Temporary: find out what rq tests are waiting on when they stall in CI
+    with tempfile.TemporaryFile("w+") as f:
+        faulthandler.dump_traceback_later(8, repeat=True, file=f)
+        try:
+            yield
+        finally:
+            faulthandler.cancel_dump_traceback_later()
+            f.seek(0)
+            dump = f.read()
+            if dump:
+                tr = request.config.pluginmanager.get_plugin("terminalreporter")
+                tr.write_line(f"\n=== stacks for {request.node.nodeid} ===\n{dump}")