Properly close channel container #985

Job	Run time
macOS [UBSAN] [lmdb \| clang]	33m 40s
macOS [ASAN] [lmdb \| clang]	26m 28s
macOS [TSAN] [lmdb \| clang] (Errors Ignored)	31m 15s
Linux [UBSAN] [lmdb \| clang]	38m 31s
macOS [UBSAN] [rocksdb \| clang]	42m 47s
Linux [ASAN] [lmdb \| clang]	35m 48s
macOS [ASAN] [rocksdb \| clang]	38m 8s
Linux [ASAN_INT] [lmdb \| clang] (Errors Ignored)	37m 1s
macOS [TSAN] [rocksdb \| clang] (Errors Ignored)	50m 17s
Linux [TSAN] [lmdb \| clang] (Errors Ignored)	13m 19s
Linux [LEAK] [lmdb \| clang] (Errors Ignored)	13m 15s
Linux [UBSAN] [rocksdb \| clang]	43m 49s
Linux [ASAN] [rocksdb \| clang]	25m 31s
Linux [ASAN_INT] [rocksdb \| clang] (Errors Ignored)	23m 53s
Linux [TSAN] [rocksdb \| clang] (Errors Ignored)	15m 32s
Linux [LEAK] [rocksdb \| clang] (Errors Ignored)	34m 3s
	8h 23m 17s

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