diff --git a/src/pl/plpython/plpython.c b/src/pl/plpython/plpython.c
index e1a976ec6e..0c4d0928e2 100644
--- a/src/pl/plpython/plpython.c
+++ b/src/pl/plpython/plpython.c
@@ -1,7 +1,7 @@
 /**********************************************************************
  * plpython.c - python as a procedural language for PostgreSQL
  *
- *	$PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.148 2010/07/08 19:00:11 tgl Exp $
+ *	$PostgreSQL: pgsql/src/pl/plpython/plpython.c,v 1.149 2010/08/25 19:37:56 petere Exp $
  *
  *********************************************************************
  */
@@ -1315,6 +1315,8 @@ PLy_procedure_get(FunctionCallInfo fcinfo, Oid tgreloid)
 			elog(FATAL, "expected a PyCObject, didn't get one");
 
 		proc = PyCObject_AsVoidPtr(plproc);
+		if (!proc)
+			PLy_elog(ERROR, "PyCObject_AsVoidPtr() failed");
 		if (proc->me != plproc)
 			elog(FATAL, "proc->me != plproc");
 		/* did we find an up-to-date cache entry? */
@@ -1539,8 +1541,11 @@ PLy_procedure_create(HeapTuple procTup, Oid tgreloid, char *key)
 		PLy_procedure_compile(proc, procSource);
 
 		pfree(procSource);
+		procSource = NULL;
 
 		proc->me = PyCObject_FromVoidPtr(proc, NULL);
+		if (!proc->me)
+			PLy_elog(ERROR, "PyCObject_FromVoidPtr() failed");
 		PyDict_SetItemString(PLy_procedure_cache, key, proc->me);
 	}
 	PG_CATCH();