re PR c/21879 (Memory management problem)

	PR c/21879
	* c-decl.c (start_function): Restore label_context_stack_se and
	label_context_stack_vm  if returning with an error.

From-SVN: r100557

gcc/ChangeLog

+2005-06-03  Joseph S. Myers  <joseph@codesourcery.com>
+
+	PR c/21879
+	* c-decl.c (start_function): Restore label_context_stack_se and
+	label_context_stack_vm  if returning with an error.
+
 2005-06-03  Gabriel Dos Reis  <gdr@integrable-solutions.net>
 
 	* configure.ac: Check declaration for asprintf, needed by

gcc/c-decl.c

@@ -5802,7 +5802,11 @@ start_function (struct c_declspecs *declspecs, struct c_declarator *declarator,
   /* If the declarator is not suitable for a function definition,
      cause a syntax error.  */
   if (decl1 == 0)
-    return 0;
+    {
+      label_context_stack_se = label_context_stack_se->next;
+      label_context_stack_vm = label_context_stack_vm->next;
+      return 0;
+    }
 
   decl_attributes (&decl1, attributes, 0);