From 9c90d09b796286cccd3e71706158b0fc4520cf6e Mon Sep 17 00:00:00 2001
From: sunmy2019 <59365878+sunmy2019@users.noreply.github.com>
Date: Sat, 22 Apr 2023 03:45:54 +0800
Subject: [PATCH] do not use `tok_mode` at call_invalid_rules mode

---
 Lib/test/test_fstring.py | 13 +++++++++++++
 Parser/action_helpers.c  |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Lib/test/test_fstring.py b/Lib/test/test_fstring.py
index 0e71de85f16b9c..238d6e0be04115 100644
--- a/Lib/test/test_fstring.py
+++ b/Lib/test/test_fstring.py
@@ -1532,5 +1532,18 @@ def test_syntax_error_for_starred_expressions(self):
                                     "f-string: expecting a valid expression after '{'"):
             compile("f'{**a}'", "?", "exec")
 
+    def test_semicolon(self):
+        self.assertAllRaise(SyntaxError,
+                            "f-string: expecting a valid expression after '{'",
+                            ["f'{_=}{;",
+                             "f'{1=}{+;'",
+                             "f'{1=}{2}{;'",
+                             ])
+        self.assertAllRaise(SyntaxError,
+                            "f-string: expecting '=', or '!', or ':', or '}'",
+                            ["f'{1=}{1;'",
+                             "f'{1=}{1;}'",
+                             ])
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/Parser/action_helpers.c b/Parser/action_helpers.c
index 55c0f6fdd620f4..434147abf03cf0 100644
--- a/Parser/action_helpers.c
+++ b/Parser/action_helpers.c
@@ -1415,7 +1415,7 @@ expr_ty _PyPegen_formatted_value(Parser *p, expr_ty expression, Token *debug, ex
         end_col_offset, arena
     );
 
-    if (debug) {
+    if (debug && !p->call_invalid_rules) {
         /* Find the non whitespace token after the "=" */
         int debug_end_line, debug_end_offset;