updated for version 7.3.691

Problem:    State specific to the Python thread is discarded.
Solution:   Keep state between threads. (Paul)

src/if_python.c

@@ -740,9 +740,11 @@ Python_Init(void)
 #else
 	PyMac_Initialize();
 #endif
-	/* initialise threads */
+	/* Initialise threads and save the state using PyGILState_Ensure.
+	 * Without this call, thread-specific state (such as the system trace
+	 * hook), will be lost between invocations of Python code.  */
 	PyEval_InitThreads();
-
+	pygilstate = PyGILState_Ensure();
 #ifdef DYNAMIC_PYTHON
 	get_exceptions();
 #endif

src/version.c

@@ -719,6 +719,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    691,
 /**/
     690,
 /**/