Goto bug fix.

jedi/api/__init__.py

@@ -407,7 +407,11 @@ class Script(object):
         if last_name is None:
             last_name = stmt
             while not isinstance(last_name, pr.Name):
-                last_name = last_name.children[-1]
+                try:
+                    last_name = last_name.children[-1]
+                except AttributeError:
+                    # Doesn't have a name in it.
+                    return []
 
         if next(context) in ('class', 'def'):
             # The cursor is on a class/function name.

test/test_api/test_api.py

@@ -101,10 +101,11 @@ def test_completion_on_complex_literals():
     assert api.Script('4j').completions() == []
 
 
-def test_goto_assignments_on_non_statement():
+def test_goto_assignments_on_non_name():
     assert api.Script('for').goto_assignments() == []
 
     assert api.Script('assert').goto_assignments() == []
+    assert api.Script('True').goto_assignments() == []
 
 
 def test_goto_definition_not_multiple():