temp: check the skip condition

Author: nedbat

coverage/env.py

@@ -40,6 +40,9 @@
 else:
     PYPYVERSION = (0,)
 
+# Does this version of Python have a GIL?
+GIL = getattr(sys, '_is_gil_enabled', lambda: True)()
+
 # Python behavior.
 class PYBEHAVIOR:
     """Flags indicating this Python's behavior."""

tests/test_oddball.py

@@ -213,6 +213,10 @@ def once(x):                                        # line 301
     @pytest.mark.skipif(not testenv.C_TRACER, reason="Only the C tracer has refcounting issues")
     # In fact, sysmon explicitly holds onto all code objects,
     # so this will definitely fail with sysmon.
+    @pytest.mark.skipif(
+        env.PYVERSION[:2] == (3, 13) and not env.GIL,
+        reason = "3.13t never frees code objects: https://github.com/python/cpython/pull/131989",
+    )
     @pytest.mark.parametrize("branch", [False, True])
     def test_eval_codeobject_leak(self, branch: bool) -> None:
         # https://github.com/nedbat/coveragepy/issues/1924
@@ -232,6 +236,7 @@ def test_eval_codeobject_leak(self, branch: bool) -> None:
             print(f"Mem delta: {(now - base)//1024}")
             base = now
         assert any(d < 50 * 1024 for d in deltas)
+        1/0
 
 
 class MemoryFumblingTest(CoverageTest):