Incorrect parsing of unbalanced braces based on issue 6914 (#7621)

src/tests/test_parser.rs

@@ -470,3 +470,8 @@ fn or_and_xor() -> TestResult {
     // Assumes the precedence NOT > AND > XOR > OR
     run_test(r#"true or false xor true or false"#, "true")
 }
+
+#[test]
+fn unbalanced_delimiter() -> TestResult {
+    fail_test(r#"{a:{b:5}}}"#, "unbalanced { and }")
+}