bpo-43823: Improve syntax errors for invalid dictionary literals (GH-25378)
diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index bd6a4d3..75b778d 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -880,6 +880,38 @@
Traceback (most recent call last):
SyntaxError: invalid syntax
+Incomplete dictionary literals
+
+ >>> {1:2, 3:4, 5}
+ Traceback (most recent call last):
+ SyntaxError: ':' expected after dictionary key
+
+ >>> {1:2, 3:4, 5:}
+ Traceback (most recent call last):
+ SyntaxError: expression expected after dictionary key and ':'
+
+ >>> {1: *12+1, 23: 1}
+ Traceback (most recent call last):
+ SyntaxError: cannot use a starred expression in a dictionary value
+
+ >>> {1: *12+1}
+ Traceback (most recent call last):
+ SyntaxError: cannot use a starred expression in a dictionary value
+
+ >>> {1: 23, 1: *12+1}
+ Traceback (most recent call last):
+ SyntaxError: cannot use a starred expression in a dictionary value
+
+ >>> {1:}
+ Traceback (most recent call last):
+ SyntaxError: expression expected after dictionary key and ':'
+
+ # Ensure that the error is not raise for syntax errors that happen after sets
+
+ >>> {1} $
+ Traceback (most recent call last):
+ SyntaxError: invalid syntax
+
Make sure that the old "raise X, Y[, Z]" form is gone:
>>> raise X, Y
Traceback (most recent call last):