From 904ddfa28f82b2cc5071c3c24db941b777a88dfa Mon Sep 17 00:00:00 2001
From: Martok <martok@martoks-place.de>
Date: Sun, 25 Dec 2022 16:41:45 +0100
Subject: [PATCH] Follow-up #2060 - Correctly handle \k in non-unicode
 expressions

---
 js/src/irregexp/RegExpParser.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/src/irregexp/RegExpParser.cpp b/js/src/irregexp/RegExpParser.cpp
index 0deb3c658d..c609f5940d 100644
--- a/js/src/irregexp/RegExpParser.cpp
+++ b/js/src/irregexp/RegExpParser.cpp
@@ -2069,8 +2069,8 @@ RegExpParser<CharT>::ParseDisjunction()
                 // an identity escape for non-Unicode patterns without named
                 // capture groups, and as the beginning of a named back-reference
                 // in all other cases.
+                Advance(2);
                 if (unicode_ || HasNamedCaptures()) {
-                  Advance(2);
                   if (!ParseNamedBackReference(builder, state)) {
                     return ReportError(JSMSG_INVALID_IDENTITY_ESCAPE);
                   }