Fix some stuff that caused issues in Jedi.

parso/python/parser.py

@@ -139,7 +139,8 @@ class Parser(BaseParser):
         else:
             last_leaf = None
 
-        if typ == ENDMARKER or typ == DEDENT and '\n' not in last_leaf.value:
+        if self._start_symbol == 'file_input' and \
+                (typ == ENDMARKER or typ == DEDENT and '\n' not in last_leaf.value):
             def reduce_stack(states, newstate):
                 # reduce
                 state = newstate

parso/python/tree.py

@@ -73,7 +73,7 @@ class PythonMixin(object):
         scope = self
         while scope.parent is not None:
             parent = scope.parent
-            if isinstance(scope, (PythonNode, PythonLeaf)) and parent.type != 'simple_stmt':
+            if isinstance(scope, (PythonNode, PythonLeaf)) and parent.type not in ('simple_stmt', 'file_input'):
                 if scope.type == 'testlist_comp':
                     try:
                         if scope.children[1].type == 'comp_for':

test/test_parser.py

@@ -184,3 +184,18 @@ def test_dedent_at_end():
     suite = module.children[0].children[-1]
     foobar = suite.children[-1]
     assert foobar.type == 'name'
+
+
+def test_no_error_nodes():
+    def check(node):
+        assert node.type not in ('error_leaf', 'error_node')
+
+        try:
+            children = node.children
+        except AttributeError:
+            pass
+        else:
+            for child in children:
+                check(child)
+
+    check(parse("if foo:\n bar"))