def/class keywords after an opening parentheses led to empty arrays without closing brackets, tests & fixes #416

jedi/parser/representation.py

@@ -1023,7 +1023,11 @@ isinstance(c, (tokenize.Token, Operator)) else unicode(c)
                 # always dictionaries and not sets.
                 arr.type = Array.DICT
 
-            arr.end_pos = (break_tok or stmt or old_stmt).end_pos
+            try:
+                arr.end_pos = (break_tok or stmt or old_stmt).end_pos
+            except UnboundLocalError:
+                # In case of something like `(def`
+                arr.end_pos = start_pos[0], start_pos[1] + 1
             return arr, break_tok
 
         def parse_stmt(token_iterator, maybe_dict=False, added_breaks=(),

test/completion/parser.py

@@ -25,3 +25,12 @@ IndentIssues().one_param()
 
 #? str()
 IndentIssues().with_param('')
+
+
+"""
+Just because there's a def keyword, doesn't mean it should not be able to
+complete to definition.
+"""
+definition = 0
+#? ['definition', 'def']
+str(def