updated for version 7.4.609 Problem: For complicated list and dict use the garbage collector can run out of stack space. Solution: Use a stack of dicts and lists to be marked, thus making it iterative instead of recursive. (Ben Fritz)

--- a/src/if_python.c
+++ b/src/if_python.c
@@ -1567,8 +1567,8 @@ Py_GetProgramName(void)
 }
 #endif /* Python 1.4 */
 
-    void
+    int
 set_ref_in_python (int copyID)
 {
-    set_ref_in_py(copyID);
+    return set_ref_in_py(copyID);
 }