Py_Main(): When compiled by Insure (i.e. __INSURE__ is defined), call
the internal API function to release the interned strings as the very
last thing before returning status. This aids in memory use debugging
because it eliminates a huge source of noise from the reports. This
is never called during normal (non-debugging) use because releasing
the interned strings slows Python's shutdown and isn't necessary
anyway because the system will always reclaim the memory.
diff --git a/Modules/main.c b/Modules/main.c
index 49dc4aa..bef2574 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -301,6 +301,20 @@
sts = PyRun_AnyFile(stdin, "<stdin>") != 0;
Py_Finalize();
+
+#ifdef __INSURE__
+ /* Insure++ is a memory analysis tool that aids in discovering
+ * memory leaks and other memory problems. On Python exit, the
+ * interned string dictionary is flagged as being in use at exit
+ * (which it is). Under normal circumstances, this is fine because
+ * the memory will be automatically reclaimed by the system. Under
+ * memory debugging, it's a huge source of useless noise, so we
+ * trade off slower shutdown for less distraction in the memory
+ * reports. -baw
+ */
+ _Py_ReleaseInternedStrings();
+#endif /* __INSURE__ */
+
return sts;
}