SyncStatusTest UT detected memory leaks

[hehechen]

https://ci.pingcap.net/blue/organizations/jenkins/tiflash-sanitizer-daily/detail/tiflash-sanitizer-daily/550/pipeline/

[2022-09-25T18:49:24.883Z] =================================================================
[2022-09-25T18:49:24.883Z] ==173576==ERROR: LeakSanitizer: detected memory leaks
[2022-09-25T18:49:24.883Z]
[2022-09-25T18:49:24.883Z] Direct leak of 24 byte(s) in 1 object(s) allocated from:
[2022-09-25T18:49:24.883Z] #0 0x316a40d in operator new(unsigned long) /llvm-project/compiler-rt/lib/asan/asan_new_delete.cpp:95:3
[2022-09-25T18:49:24.883Z] #1 0x156d0d7a in DB::RawCppString* DB::RawCppString::New<std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > >(std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >&&) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/ProxyFFICommon.h:39:16
[2022-09-25T18:49:24.883Z] #2 0x156d0d7a in DB::HandleHttpRequestSyncStatus(DB::EngineStoreServerWrap*, std::__1::basic_string_view<char, std::__1::char_traits >, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, std::__1::basic_string_view<char, std::__1::char_traits >, std::__1::basic_string_view<char, std::__1::char_traits >) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/ProxyFFIStatusService.cpp:92:16
[2022-09-25T18:49:24.883Z] #3 0x156d215a in HandleHttpRequest /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/ProxyFFIStatusService.cpp:138:20
[2022-09-25T18:49:24.883Z] #4 0x7fb1277 in DB::tests::SyncStatusTest_TestNormalRegion_Test::TestBody() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/tests/gtest_sync_status.cpp:229:16
[2022-09-25T18:49:24.883Z] #5 0x120ca0e0 in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2443:10
[2022-09-25T18:49:24.884Z] #6 0x120ca0e0 in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2479:14
[2022-09-25T18:49:24.884Z] #7 0x12068888 in testing::Test::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2517:5
[2022-09-25T18:49:24.884Z] #8 0x1206ba17 in testing::TestInfo::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2693:11
[2022-09-25T18:49:24.884Z] #9 0x1206cf8f in testing::TestCase::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2811:28
[2022-09-25T18:49:24.884Z] #10 0x120979a8 in testing::internal::UnitTestImpl::RunAllTests() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:5177:43
[2022-09-25T18:49:24.884Z] #11 0x120cc6e0 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2443:10
[2022-09-25T18:49:24.884Z] #12 0x120cc6e0 in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2479:14
[2022-09-25T18:49:24.884Z] #13 0x12096221 in testing::UnitTest::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:4786:10
[2022-09-25T18:49:24.884Z] #14 0x813243a in RUN_ALL_TESTS() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/include/gtest/gtest.h:2341:46
[2022-09-25T18:49:24.884Z] #15 0x813243a in main /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/TestUtils/gtests_dbms_main.cpp:78:16
[2022-09-25T18:49:24.884Z] #16 0x7f95beed1554 in __libc_start_main (/lib64/libc.so.6+0x22554)
[2022-09-25T18:49:24.884Z]
[2022-09-25T18:49:24.884Z] Indirect leak of 64 byte(s) in 1 object(s) allocated from:
[2022-09-25T18:49:24.884Z] #0 0x316a40d in operator new(unsigned long) /llvm-project/compiler-rt/lib/asan/asan_new_delete.cpp:95:3
[2022-09-25T18:49:24.884Z] #1 0x31b71a6 in void* std::__1::__libcpp_operator_new(unsigned long) /usr/local/bin/../include/c++/v1/new:235:10
[2022-09-25T18:49:24.884Z] #2 0x31b71a6 in std::__1::__libcpp_allocate(unsigned long, unsigned long) /usr/local/bin/../include/c++/v1/new:261:10
[2022-09-25T18:49:24.884Z] #3 0x31b71a6 in std::__1::allocator::allocate(unsigned long) /usr/local/bin/../include/c++/v1/__memory/allocator.h:108:38
[2022-09-25T18:49:24.884Z] #4 0x31b71a6 in std::__1::allocator_traits<std::__1::allocator >::allocate(std::__1::allocator&, unsigned long) /usr/local/bin/../include/c++/v1/__memory/allocator_traits.h:262:20
[2022-09-25T18:49:24.884Z] #5 0x31b71a6 in std::__1::_MetaBase<__is_cpp17_forward_iterator<char*>::value>::_EnableIfImpl std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >::__init<char*>(char*, char*) /usr/local/bin/../include/c++/v1/string:2183:15
[2022-09-25T18:49:24.884Z] #6 0x31b71a6 in std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >::basic_string<char*, void>(char*, char*, std::__1::allocator const&) /usr/local/bin/../include/c++/v1/string:2226:5
[2022-09-25T18:49:24.884Z] #7 0x31b71a6 in std::__1::basic_stringbuf<char, std::__1::char_traits, std::__1::allocator >::str() const /usr/local/bin/../include/c++/v1/sstream:445:16
[2022-09-25T18:49:24.884Z] #8 0x156d0d70 in std::__1::basic_stringstream<char, std::__1::char_traits, std::__1::allocator >::str() const /usr/local/bin/../include/c++/v1/sstream:843:22
[2022-09-25T18:49:24.884Z] #9 0x156d0d70 in DB::HandleHttpRequestSyncStatus(DB::EngineStoreServerWrap*, std::__1::basic_string_view<char, std::__1::char_traits >, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator > const&, std::__1::basic_string_view<char, std::__1::char_traits >, std::__1::basic_string_view<char, std::__1::char_traits >) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/ProxyFFIStatusService.cpp:92:37
[2022-09-25T18:49:24.884Z] #10 0x156d215a in HandleHttpRequest /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/ProxyFFIStatusService.cpp:138:20
[2022-09-25T18:49:24.885Z] #11 0x7fb1277 in DB::tests::SyncStatusTest_TestNormalRegion_Test::TestBody() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/Storages/Transaction/tests/gtest_sync_status.cpp:229:16
[2022-09-25T18:49:24.885Z] #12 0x120ca0e0 in void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2443:10
[2022-09-25T18:49:24.885Z] #13 0x120ca0e0 in void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2479:14
[2022-09-25T18:49:24.885Z] #14 0x12068888 in testing::Test::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2517:5
[2022-09-25T18:49:24.885Z] #15 0x1206ba17 in testing::TestInfo::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2693:11
[2022-09-25T18:49:24.885Z] #16 0x1206cf8f in testing::TestCase::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2811:28
[2022-09-25T18:49:24.885Z] #17 0x120979a8 in testing::internal::UnitTestImpl::RunAllTests() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:5177:43
[2022-09-25T18:49:24.885Z] #18 0x120cc6e0 in bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2443:10
[2022-09-25T18:49:24.885Z] #19 0x120cc6e0 in bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::)(), char const) /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:2479:14
[2022-09-25T18:49:24.885Z] #20 0x12096221 in testing::UnitTest::Run() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/src/gtest.cc:4786:10
[2022-09-25T18:49:24.885Z] #21 0x813243a in RUN_ALL_TESTS() /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/contrib/googletest/googletest/include/gtest/gtest.h:2341:46
[2022-09-25T18:49:24.885Z] #22 0x813243a in main /home/jenkins/agent/workspace/tiflash-sanitizer-daily/tiflash/dbms/src/TestUtils/gtests_dbms_main.cpp:78:16
[2022-09-25T18:49:24.885Z] #23 0x7f95beed1554 in __libc_start_main (/lib64/libc.so.6+0x22554)
[2022-09-25T18:49:24.885Z]
[2022-09-25T18:49:24.885Z] SUMMARY: AddressSanitizer: 88 byte(s) leaked in 2 allocation(s).