diff --git a/backport-Disallow-repeating-a-case-change-group.patch b/backport-Disallow-repeating-a-case-change-group.patch
new file mode 100644
index 0000000000000000000000000000000000000000..c7ec8140925dce2079ee0d7496ac8ab6988bba53
--- /dev/null
+++ b/backport-Disallow-repeating-a-case-change-group.patch
@@ -0,0 +1,42 @@
+From 370afe3f446c69a7ccc4c09f056272346afc264b Mon Sep 17 00:00:00 2001
+From: zhangyiru <zhangyiru3@huawei.com>
+Date: Thu, 14 Oct 2021 15:55:56 -0400
+Subject: [PATCH] Disallow repeating a case-change group
+
+fix assertion failed: https://github.com/boostorg/regex/issues/151
+
+Signed-off-by: zhangyiru <zhangyiru3@huawei.com>
+---
+ boost/regex/v4/basic_regex_parser.hpp | 9 ++++++++-
+ 1 file changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/boost/regex/v4/basic_regex_parser.hpp b/boost/regex/v4/basic_regex_parser.hpp
+index 6c7065f05..2ce615943 100644
+--- a/boost/regex/v4/basic_regex_parser.hpp
++++ b/boost/regex/v4/basic_regex_parser.hpp
+@@ -1042,6 +1042,7 @@ bool basic_regex_parser<charT, traits>::parse_repeat(std::size_t low, std::size_
+       case syntax_element_jump:
+       case syntax_element_startmark:
+       case syntax_element_backstep:
++      case syntax_element_toggle_case:
+          // can't legally repeat any of the above:
+          fail(regex_constants::error_badrepeat, m_position - m_base);
+          return false;
+@@ -3116,7 +3117,13 @@ bool basic_regex_parser<charT, traits>::unwind_alts(std::ptrdiff_t last_paren_st
+       m_alt_jumps.pop_back();
+       this->m_pdata->m_data.align();
+       re_jump* jmp = static_cast<re_jump*>(this->getaddress(jump_offset));
+-      BOOST_ASSERT(jmp->type == syntax_element_jump);
++      if (jmp->type != syntax_element_jump)
++      {
++         // Something really bad happened, this used to be an assert, 
++         // but we'll make it an error just in case we should ever get here.
++         fail(regex_constants::error_unknown, this->m_position - this->m_base, "Internal logic failed while compiling the expression, probably you added a repeat to something non-repeatable!");
++         return false;
++      }
+       jmp->alt.i = this->m_pdata->m_data.size() - jump_offset;
+    }
+    return true;
+-- 
+2.27.0
+
diff --git a/backport-increase_used_block_count_when_use_-put_mem_block.patch b/backport-increase_used_block_count_when_use_-put_mem_block.patch
new file mode 100644
index 0000000000000000000000000000000000000000..d13f744d3c4221815b598ee8857e960d04dc8eac
--- /dev/null
+++ b/backport-increase_used_block_count_when_use_-put_mem_block.patch
@@ -0,0 +1,27 @@
+From db3c106f1e80e67f9ed80ee276c5e080519290ad Mon Sep 17 00:00:00 2001
+From: zhangyiru <zhangyiru3@huawei.com>
+Date: Thu, 14 Oct 2021 15:39:19 -0400
+Subject: [PATCH] increase used_block_count when use_ put_mem_block
+
+fix memleak problem: https://github.com/boostorg/regex/issues/153
+
+Signed-off-by: zhangyiru <zhangyiru3@huawei.com>
+---
+ boost/regex/v4/perl_matcher_non_recursive.hpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/boost/regex/v4/perl_matcher_non_recursive.hpp b/boost/regex/v4/perl_matcher_non_recursive.hpp
+index eb470a78d..54ce751da 100644
+--- a/boost/regex/v4/perl_matcher_non_recursive.hpp
++++ b/boost/regex/v4/perl_matcher_non_recursive.hpp
+@@ -1363,6 +1363,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::unwind_repeater_counter(bool
+ template <class BidiIterator, class Allocator, class traits>
+ bool perl_matcher<BidiIterator, Allocator, traits>::unwind_extra_block(bool)
+ {
++   ++used_block_count;
+    saved_extra_block* pmp = static_cast<saved_extra_block*>(m_backup_state);
+    void* condemmed = m_stack_base;
+    m_stack_base = pmp->base;
+-- 
+2.27.0
+
diff --git a/boost.spec b/boost.spec
index 04406ba5240322d84ba21cea7374ce6ba00aa728..4a2c2443aaec43f5acab1f3c6a6ab2bffc25f8cc 100644
--- a/boost.spec
+++ b/boost.spec
@@ -22,7 +22,7 @@
 
 Name:           boost
 Version:        1.73.0
-Release:        4
+Release:        5
 Summary:        The free peer-reviewed portable C++ source libraries
 License:        Boost Software License V1.0
 URL:            http://www.boost.org
@@ -45,6 +45,8 @@ Patch3:        boost-1.58.0-pool-test_linking.patch
 Patch4:        boost-1.66.0-no-rpath.patch
 
 Patch9000:     regex-fix-dead-loop-in-parse_repeat.patch
+Patch9001:     backport-Disallow-repeating-a-case-change-group.patch
+Patch9002:     backport-increase_used_block_count_when_use_-put_mem_block.patch
 
 Requires:       %{name}-atomic%{?_isa} = %{version}-%{release}
 Requires:       %{name}-chrono%{?_isa} = %{version}-%{release}
@@ -593,6 +595,8 @@ find ./boost -name '*.hpp' -perm /111 | xargs chmod a-x
 %patch3 -p1
 %patch4 -p1
 %patch9000 -p1
+%patch9001 -p1
+%patch9002 -p1
 
 %build
 %if %{with python3}
@@ -1139,6 +1143,13 @@ fi
 %{_mandir}/man1/bjam.1*
 
 %changelog
+* Thu Oct 14 2021 zhangyiru <zhangyiru3@huawei.com> - 1.73.0-5
+- Type:bugfix
+- ID:NA
+- SUG:NA
+- DESC:increase used_block_count when use put_mem_block
+  Disallow repeating a case-change group
+
 * Tue Jun 22 2021 Xu Huijie <xuhuijie2@huawei.com> - 1.73.0-4
 - Type:bugfix
 - ID:NA