From 87688652796d42aec7f0322212a53e32214e5d61 Mon Sep 17 00:00:00 2001
From: sobolevn <mail@sobolevn.me>
Date: Mon, 21 Apr 2025 14:14:00 +0300
Subject: [PATCH] gh-132769: Refactor possible read-out-of-bounds in `lexer.c`

---
 Parser/lexer/lexer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Parser/lexer/lexer.c b/Parser/lexer/lexer.c
index 5e68e5d035c545..e81867a5fad015 100644
--- a/Parser/lexer/lexer.c
+++ b/Parser/lexer/lexer.c
@@ -140,7 +140,7 @@ set_fstring_expr(struct tok_state* tok, struct token *token, char c) {
         for (i = 0, j = 0; i < input_length; i++) {
             if (tok_mode->last_expr_buffer[i] == '#') {
                 // Skip characters until newline or end of string
-                while (tok_mode->last_expr_buffer[i] != '\0' && i < input_length) {
+                while (i < input_length && tok_mode->last_expr_buffer[i] != '\0') {
                     if (tok_mode->last_expr_buffer[i] == '\n') {
                         result[j++] = tok_mode->last_expr_buffer[i];
                         break;