From e06498763a5265f4b328afb7685d41c0733cc7da Mon Sep 17 00:00:00 2001
From: Matthias Koefferlein <matthias@klayout.de>
Date: Wed, 5 Mar 2025 19:12:38 +0100
Subject: [PATCH] Fixing issue #1997.

---
 Changelog                          | 1 +
 src/tl/tl/tlString.cc              | 3 ++-
 src/tl/unit_tests/tlStringTests.cc | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/Changelog b/Changelog
index 7af49841b..fdab73e4d 100644
--- a/Changelog
+++ b/Changelog
@@ -5,6 +5,7 @@
   on Edges, Region, EdgePairs and Texts, delivering a pair of containers with 
   selected and unselected objects.
 * Bug: %GITHUB%/issues/1993 Tiling processor kept layout locks, causing DRC issues with "with_density"
+* Bug: %GITHUB%/issues/1997 Can not find a file in Open Recent menu (a string unescaping bug)
 * Bugfix: 'Save All' was not updating the dirty flag in the inactive tabs
 * Bugfix: Fixing a crash when editing PCell parameters while the macro editor is open
 * Bugfix: Fixed a potential Crash on "save all"
diff --git a/src/tl/tl/tlString.cc b/src/tl/tl/tlString.cc
index 28e597464..d57dee236 100644
--- a/src/tl/tl/tlString.cc
+++ b/src/tl/tl/tlString.cc
@@ -702,7 +702,8 @@ inline char unescape_char (const char * &cp)
 {
   if (safe_isdigit (*cp)) {
     int c = 0;
-    while (*cp && safe_isdigit (*cp)) {
+    unsigned int n = 0;
+    while (*cp && safe_isdigit (*cp) && n++ < 3) {
       c = c * 8 + int (*cp - '0');
       ++cp;
     }
diff --git a/src/tl/unit_tests/tlStringTests.cc b/src/tl/unit_tests/tlStringTests.cc
index 3697ed4f1..634b38e6e 100644
--- a/src/tl/unit_tests/tlStringTests.cc
+++ b/src/tl/unit_tests/tlStringTests.cc
@@ -504,6 +504,7 @@ TEST(10)
   EXPECT_EQ (escape_string ("'a\n\003"), "'a\\n\\003");
   EXPECT_EQ (escape_string ("'a\n\003"), "'a\\n\\003");
   EXPECT_EQ (unescape_string (escape_string ("'a\n\003")), "'a\n\003");
+  EXPECT_EQ (unescape_string (escape_string ("'a\n\0031")), "'a\n\0031");
 }
 
 TEST(11)