Revert ast.Starred (#1159)

Author: slozier

Src/IronPython/Modules/_ast.cs

@@ -2503,6 +2503,8 @@ public Starred(expr value, expr_context ctx)
             internal Starred(StarredExpression expr, expr_context ctx)
                 : this(Convert(expr.Value), ctx, null, null) { }
 
+            internal override AstExpression Revert() => new StarredExpression(value?.Revert());
+
             public expr_context ctx { get; set; }
 
             public expr value { get; set; }

Tests/test_ast.py

@@ -1338,6 +1338,15 @@ def test_literal_eval_cp35572(self):
         self.assertEqual(ast.literal_eval('-1.1'), -1.1)
         self.assertEqual(ast.literal_eval('+1.1'), 1.1)
 
+    def test_ipy3_gh686(self):
+        """https://github.com/IronLanguages/ironpython3/issues/686"""
+        # check that compiling ast.Starred works properly
+        x = ast.parse("*a, = [1]")
+        c = compile(x, "", "exec")
+        d = {}
+        exec(c, d)
+        self.assertEqual(d["a"], [1])
+
 def main():
     if __name__ != '__main__':
         return