Issue #7924: Fix an intermittent 'XXX undetected error' crash in

test_capi, due to test_capsule failing to clear an exception.  Many
thanks to Florent Xicluna for the diagnosis and fix.

Misc/NEWS

@@ -738,6 +738,10 @@ Documentation
 Tests
 -----
 
+- Issue #7924: Fix an intermittent 'XXX undetected error' failure in
+  test_capi (only seen so far on platforms where the curses module
+  wasn't built), due to an uncleared exception.
+
 - issue #7728: test_timeout was changed to use test_support.bind_port
   instead of a hard coded port.
 

Modules/_testcapimodule.c

@@ -1763,6 +1763,8 @@ test_capsule(PyObject *self, PyObject *args)
 			Py_DECREF(object);
 			Py_DECREF(module);
 		}
+		else
+			PyErr_Clear();
 	}
 
   exit: