diff --git a/Lib/lib2to3/fixes/fix_sys_exc.py b/Lib/lib2to3/fixes/fix_sys_exc.py
index 58bbabb..348929b 100644
--- a/Lib/lib2to3/fixes/fix_sys_exc.py
+++ b/Lib/lib2to3/fixes/fix_sys_exc.py
@@ -20,7 +20,7 @@
 
     def transform(self, node, results):
         sys_attr = results["attribute"][0]
-        index = Number(unicode(self.exc_info.index(sys_attr.value)))
+        index = Number(self.exc_info.index(sys_attr.value))
 
         call = Call(Name(u"exc_info"), prefix=sys_attr.prefix)
         attr = Attr(Name(u"sys"), call)
diff --git a/Lib/lib2to3/refactor.py b/Lib/lib2to3/refactor.py
index 5982ed0..3e94699 100644
--- a/Lib/lib2to3/refactor.py
+++ b/Lib/lib2to3/refactor.py
@@ -564,7 +564,9 @@
         This is necessary to get correct line number / offset information
         in the parser diagnostics and embedded into the parse tree.
         """
-        return self.driver.parse_tokens(self.wrap_toks(block, lineno, indent))
+        tree = self.driver.parse_tokens(self.wrap_toks(block, lineno, indent))
+        tree.future_features = frozenset()
+        return tree
 
     def wrap_toks(self, block, lineno, indent):
         """Wraps a tokenize stream to systematically modify start/end."""