Fix Python 1.5- bug in handling unpack list

uncompyle6/parsers/parse14.py

@@ -13,6 +13,7 @@ class Python14Parser(Python15Parser):
         # SET_FUNC_ARGS, and RESERVE_FAST
 
         # FIXME: should check that this indeed around __doc__
+        # Possibly not strictly needed
         stmt     ::= doc_junk
         doc_junk ::= LOAD_CONST POP_TOP
 
@@ -35,6 +36,26 @@ class Python14Parser(Python15Parser):
         super(Python14Parser, self).__init__(debug_parser)
         self.customized = {}
 
+    def customize_grammar_rules(self, tokens, customize):
+        super(Python14Parser, self).customize_grammar_rules(tokens, customize)
+        self.remove_rules("""
+        whileelsestmt ::= SETUP_LOOP testexpr l_stmts_opt
+                          jb_pop
+                          POP_BLOCK else_suitel COME_FROM
+        """)
+        self.check_reduce['doc_junk'] = 'tokens'
+
+
+    def reduce_is_invalid(self, rule, ast, tokens, first, last):
+        invalid = super(Python14Parser,
+                        self).reduce_is_invalid(rule, ast,
+                                                tokens, first, last)
+        if invalid or tokens is None:
+            return invalid
+        if rule[0] == 'doc_junk':
+            return not isinstance(tokens[first].pattr, str)
+
+
 
 class Python14ParserSingle(Python14Parser, PythonParserSingle):
     pass