Issue #21669: Special case print & exec syntax errors
diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py
index f012de1..70d85b1 100644
--- a/Lib/test/test_grammar.py
+++ b/Lib/test/test_grammar.py
@@ -390,6 +390,31 @@
check_syntax_error(self, "x + 1 = 1")
check_syntax_error(self, "a + 1 = b + 2")
+ # Check the heuristic for print & exec covers significant cases
+ # As well as placing some limits on false positives
+ def test_former_statements_refer_to_builtins(self):
+ keywords = "print", "exec"
+ # Cases where we want the custom error
+ cases = [
+ "{} foo",
+ "{} {{1:foo}}",
+ "if 1: {} foo",
+ "if 1: {} {{1:foo}}",
+ "if 1:\n {} foo",
+ "if 1:\n {} {{1:foo}}",
+ ]
+ for keyword in keywords:
+ custom_msg = "call to '{}'".format(keyword)
+ for case in cases:
+ source = case.format(keyword)
+ with self.subTest(source=source):
+ with self.assertRaisesRegex(SyntaxError, custom_msg):
+ exec(source)
+ source = source.replace("foo", "(foo.)")
+ with self.subTest(source=source):
+ with self.assertRaisesRegex(SyntaxError, "invalid syntax"):
+ exec(source)
+
def test_del_stmt(self):
# 'del' exprlist
abc = [1,2,3]