Python 2.6 a == b or c == d == 3 grammar bug

README.rst

@@ -112,7 +112,7 @@ with handling control flow. All of the Python decompilers I have looked
 at have the same problem. In some cases we can detect an erroneous
 decompilation and report that.
 
-About 90% of the decompilation of Python standard library packages in
+Over 98% of the decompilation of Python standard library packages in
 Python 2.7.12 verifies correctly. Over 99% of Python 2.7 and 3.3-3.5
 "weakly" verify. Python 2.6 drops down to 96% weakly verifying.
 Other versions drop off in quality too.

uncompyle6/parser.py

@@ -38,6 +38,12 @@ class PythonParser(GenericASTBuilder):
              # PyPy:
              'kvlist_n'])
 
+    def ast_first_offset(self, ast):
+        if hasattr(ast, 'offset'):
+            return ast.offset
+        else:
+            return self.ast_first_offset(ast[0])
+
     def add_unique_rule(self, rule, opname, count, customize):
         """Add rule to grammar, but only if it hasn't been added previously
            opname and count are used in the customize() semantic the actions

uncompyle6/parsers/parse26.py

@@ -157,7 +157,6 @@ class Python26Parser(Python2Parser):
         # Semantic actions want the else to be at position 3
         ifelsestmt     ::= testexpr      c_stmts_opt jf_cf_pop else_suite come_froms
         ifelsestmt     ::= testexpr_then c_stmts_opt jf_cf_pop else_suite come_froms
-        ifelsestmt     ::= testexpr      c_stmts_opt filler else_suitel come_froms POP_TOP
         ifelsestmt     ::= testexpr_then c_stmts_opt filler else_suitel come_froms POP_TOP
 
         # Semantic actions want else_suitel to be at index 3