Fix enc #231

Job	Run time
build-linux	1s
build-linux	6m 23s
build-linux-cmake-with-benchmark	1s
build-linux-cmake-with-benchmark	35m 8s
build-linux-cmake-with-folly	1s
build-linux-cmake-with-folly	1m 6s
build-linux-cmake-with-folly-coroutines	1s
build-linux-cmake-with-folly-coroutines	1m 25s
build-linux-cmake-with-folly-lite-no-test	1s
build-linux-cmake-with-folly-lite-no-test	39m 23s
build-linux-encrypted_env-no_compression-no_openssl	1s
build-linux-encrypted_env-no_compression-no_openssl	31m 22s
build-linux-gcc-7-with-folly	1s
build-linux-gcc-7-with-folly	1m 14s
build-linux-encrypted_env-openssl	1s
build-linux-encrypted_env-openssl	30m 17s
build-linux-gcc-7-with-folly-lite-no-test	1s
build-linux-gcc-7-with-folly-lite-no-test	6m 57s
	2h 33m 24s

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