diff --git a/add-some-testcases-for-abnormal-branches.patch b/add-some-testcases-for-abnormal-branches.patch
new file mode 100644
index 0000000000000000000000000000000000000000..3a3dab7986a7267bb0ec7c9069fe788afca69ead
--- /dev/null
+++ b/add-some-testcases-for-abnormal-branches.patch
@@ -0,0 +1,42 @@
+From 1e89b6846a1a2597a7e9c4ad23842e6be534b87e Mon Sep 17 00:00:00 2001
+From: zhouyh <zhouyihang3@h-partners.com>
+Date: Wed, 14 Dec 2022 18:42:49 +0800
+Subject: [PATCH] add some testcases for abnormal branches
+
+---
+ re2/testing/re2_test.cc | 12 ++++++++++++
+ 1 file changed, 12 insertions(+)
+
+diff --git a/re2/testing/re2_test.cc b/re2/testing/re2_test.cc
+index b1f7d73..51a1739 100644
+--- a/re2/testing/re2_test.cc
++++ b/re2/testing/re2_test.cc
+@@ -211,6 +211,16 @@ TEST(CheckRewriteString, all) {
+   TestCheckRewriteString("a(b)(c)", "f\\oo\\1", false);
+ }
+
++TEST(RE2, Rewrite) {
++  RE2 re("(foo)|(bar)baz");
++  StringPiece group[4];
++  std::string out;
++
++  ASSERT_FALSE(re.Rewrite(&out, "hello\\5", group, arraysize(group)));
++  ASSERT_FALSE(re.Rewrite(&out,"hello\\a", group, arraysize(group)));
++  ASSERT_TRUE(re.Rewrite(&out,"hello\\\\", group, arraysize(group)));
++}
++
+ TEST(RE2, Extract) {
+   std::string s;
+
+@@ -360,6 +370,8 @@ TEST(RE2, Match) {
+   ASSERT_EQ(group[1], "chrisr:9000");
+   ASSERT_EQ(group[2], "chrisr");
+   ASSERT_EQ(group[3], "9000");
++  ASSERT_FALSE(
++     re.Match(s, 2, 1, RE2::UNANCHORED, group, arraysize(group)));
+
+   std::string all, host;
+   int port;
+--
+2.33.0
+
diff --git a/re2.spec b/re2.spec
index 5745581a23386f65687304a38c0ee0f88ab0e4ba..268b60e58012b54b341ea7b56ba9fc8de32f01d7 100644
--- a/re2.spec
+++ b/re2.spec
@@ -1,11 +1,12 @@
 Name:           re2
 Version:        20211101
-Release:        2
+Release:        3
 Summary:        Provide backtracking RE engine
 License:        BSD
 URL:            http://github.com/google/re2/
 Source0:        https://github.com/google/re2/archive/2021-11-01.tar.gz
 Patch0:         backport-fix-64-to-32-bit-clang-conversion-warning.patch
+Patch1:         add-some-testcases-for-abnormal-branches.patch
 BuildRequires:  gcc-c++
 
 %description
@@ -50,6 +51,9 @@ make %{?_smp_mflags} shared-test
 %exclude %{_libdir}/libre2.a
 
 %changelog
+* Wed Dec 14 2022 zhouyihang <zhouyihang3@h-partners.com> - 20211101-3
+- add some testcases for abnormal branches
+
 * Mon Oct 24 2022 gaihuiying <eaglegai@163.com> - 20211101-2
 - fix 64 to 32 bit clang conversion warning