fix memory leak issue #2871 (#2872) #1655

Job	Run time
clang-compile-with-bazel	13m 16s
clang-compile-with-cmake	2m 51s
clang-compile-with-make	3m 6s
gcc-compile-with-bazel	14m 35s
gcc-compile-with-bazel-all-options	16m 19s
gcc-compile-with-boringssl	15m 23s
gcc-compile-with-cmake	3m 13s
gcc-compile-with-cmake-all-options	5m 42s
gcc-compile-with-make	2m 50s
gcc-compile-with-make-all-options	5m 10s
clang-compile-with-bazel-all-options	14m 17s
clang-compile-with-boringssl	14m 16s
clang-compile-with-cmake-all-options	5m 8s
clang-compile-with-make-all-options	6m 0s
clang-unittest	11m 16s
	2h 13m 22s

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