==16==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 123 byte(s) in 1 object(s) allocated from:
    #0 0x49a81d in malloc /tmp/clang-build/src/compiler-rt/lib/asan/asan_malloc_linux.cpp:145:3
    #1 0x7f1092275d78 in gpr_malloc /proc/self/cwd/src/core/lib/gpr/alloc.cc:32:7
    #2 0x7f109251e825 in grpc_core::InternedSliceRefcount* InternNewStringLocked<grpc_slice>(slice_shard*, unsigned long, unsigned int, grpc_slice const&) /proc/self/cwd/src/core/lib/slice/slice_intern.cc:213:43
    #3 0x7f109251cb34 in grpc_core::InternedSliceRefcount* FindOrCreateInternedSlice<grpc_slice>(unsigned int, grpc_slice const&) /proc/self/cwd/src/core/lib/slice/slice_intern.cc:267:9
    #4 0x7f109251c5a0 in grpc_core::ManagedMemorySlice::ManagedMemorySlice(grpc_slice const*) /proc/self/cwd/src/core/lib/slice/slice_intern.cc:303:38
    #5 0x4cc1ad in BM_SliceReIntern(benchmark::State&) /proc/self/cwd/test/cpp/microbenchmarks/bm_metadata.cc:62:33
    #6 0x7f1091f8a527 in benchmark::internal::FunctionBenchmark::Run(benchmark::State&) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_register.cc:496:42
    #7 0x7f1091f8005f in benchmark::internal::BenchmarkInstance::Run(unsigned long, int, benchmark::internal::ThreadTimer*, benchmark::internal::ThreadManager*) const /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_api_internal.cc:10:14
    #8 0x7f1091fb753f in benchmark::internal::(anonymous namespace)::RunInThread(benchmark::internal::BenchmarkInstance const*, unsigned long, int, benchmark::internal::ThreadManager*) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_runner.cc:119:17
    #9 0x7f1091fb5948 in benchmark::internal::(anonymous namespace)::BenchmarkRunner::DoNIterations() /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_runner.cc:214:5
    #10 0x7f1091fb45c8 in benchmark::internal::(anonymous namespace)::BenchmarkRunner::DoOneRepetition(long) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_runner.cc:299:11
    #11 0x7f1091fb3c74 in benchmark::internal::(anonymous namespace)::BenchmarkRunner::BenchmarkRunner(benchmark::internal::BenchmarkInstance const&, std::vector<benchmark::BenchmarkReporter::Run, std::allocator<benchmark::BenchmarkReporter::Run> >*) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_runner.cc:161:7
    #12 0x7f1091fb2b38 in benchmark::internal::RunBenchmark(benchmark::internal::BenchmarkInstance const&, std::vector<benchmark::BenchmarkReporter::Run, std::allocator<benchmark::BenchmarkReporter::Run> >*) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark_runner.cc:355:29
    #13 0x7f1091f7476f in benchmark::internal::(anonymous namespace)::RunBenchmarks(std::vector<benchmark::internal::BenchmarkInstance, std::allocator<benchmark::internal::BenchmarkInstance> > const&, benchmark::BenchmarkReporter*, benchmark::BenchmarkReporter*) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark.cc:265:32
    #14 0x7f1091f7355d in benchmark::RunSpecifiedBenchmarks(benchmark::BenchmarkReporter*, benchmark::BenchmarkReporter*) /proc/self/cwd/external/com_github_google_benchmark/src/benchmark.cc:399:5
    #15 0x7f1091f72c02 in benchmark::RunSpecifiedBenchmarks() /proc/self/cwd/external/com_github_google_benchmark/src/benchmark.cc:340:10
    #16 0x4d7b88 in benchmark::RunTheBenchmarksNamespaced() /proc/self/cwd/test/cpp/microbenchmarks/bm_metadata.cc:293:37
    #17 0x4d7d6c in main /proc/self/cwd/test/cpp/microbenchmarks/bm_metadata.cc:300:3
    #18 0x7f109132082f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)

Objects leaked above:
0x60c006598840 (123 bytes)

SUMMARY: AddressSanitizer: 123 byte(s) leaked in 1 allocation(s).