[INFO] fetching crate merkle-tree-stream 0.12.1...
[INFO] testing merkle-tree-stream-0.12.1 against 1.49.0 for beta-1.50-1
[INFO] extracting crate merkle-tree-stream 0.12.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate merkle-tree-stream 0.12.1 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merkle-tree-stream 0.12.1
[INFO] finished tweaking crates.io crate merkle-tree-stream 0.12.1
[INFO] tweaked toml for crates.io crate merkle-tree-stream 0.12.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate merkle-tree-stream 0.12.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e09ebdf996338dd1ff551b1028b9b4181fb72833bdf307088ea6a891548a091d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e09ebdf996338dd1ff551b1028b9b4181fb72833bdf307088ea6a891548a091d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e09ebdf996338dd1ff551b1028b9b4181fb72833bdf307088ea6a891548a091d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e09ebdf996338dd1ff551b1028b9b4181fb72833bdf307088ea6a891548a091d", kill_on_drop: false }`
[INFO] [stdout] e09ebdf996338dd1ff551b1028b9b4181fb72833bdf307088ea6a891548a091d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e0069eab3ae031c8002366b6f63f99bd1a873217cd03bbc53724de7e2c54e269
[INFO] running `Command { std: "docker" "start" "-a" "e0069eab3ae031c8002366b6f63f99bd1a873217cd03bbc53724de7e2c54e269", kill_on_drop: false }`
[INFO] [stderr]    Compiling flat-tree v5.0.0
[INFO] [stderr]    Compiling merkle-tree-stream v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "e0069eab3ae031c8002366b6f63f99bd1a873217cd03bbc53724de7e2c54e269", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e0069eab3ae031c8002366b6f63f99bd1a873217cd03bbc53724de7e2c54e269", kill_on_drop: false }`
[INFO] [stdout] e0069eab3ae031c8002366b6f63f99bd1a873217cd03bbc53724de7e2c54e269
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 30ac1fb7e3843cbbf5963dc82cc55017d2038e7f7089951533eac7a0cbe404dc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "30ac1fb7e3843cbbf5963dc82cc55017d2038e7f7089951533eac7a0cbe404dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling cc v1.0.58
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling parking v1.0.4
[INFO] [stderr]    Compiling waker-fn v1.0.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling fastrand v1.3.3
[INFO] [stderr]    Compiling scoped-tls v1.0.0
[INFO] [stderr]    Compiling async-task v3.0.0
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling pin-project-lite v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling concurrent-queue v1.1.1
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.7
[INFO] [stderr]    Compiling aho-corasick v0.7.13
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling regex v1.3.9
[INFO] [stderr]    Compiling env_logger v0.7.1
[INFO] [stderr]    Compiling quickcheck v0.9.2
[INFO] [stderr]    Compiling crypto-hash v0.3.4
[INFO] [stderr]    Compiling pin-project v0.4.22
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling blocking v0.4.6
[INFO] [stderr]    Compiling smol v0.1.18
[INFO] [stderr]    Compiling async-std v1.6.2
[INFO] [stderr]    Compiling merkle-tree-stream v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `Command { std: "docker" "inspect" "30ac1fb7e3843cbbf5963dc82cc55017d2038e7f7089951533eac7a0cbe404dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30ac1fb7e3843cbbf5963dc82cc55017d2038e7f7089951533eac7a0cbe404dc", kill_on_drop: false }`
[INFO] [stdout] 30ac1fb7e3843cbbf5963dc82cc55017d2038e7f7089951533eac7a0cbe404dc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f063f0eb194599c8bbac7a26d8b1523b5fd3fa677bddfd7438b6737762afe048
[INFO] running `Command { std: "docker" "start" "-a" "f063f0eb194599c8bbac7a26d8b1523b5fd3fa677bddfd7438b6737762afe048", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/merkle_tree_stream-47ac0ae7e2015cfc
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lib-ba5c5753eee11a02
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test mts_new_with_nodes ... ok
[INFO] [stdout] test mts_one_node ... ok
[INFO] [stdout] test mts_more_nodes ... ok
[INFO] [stdout] test all_leaves_contain_data ... ok
[INFO] [stdout] test all_nodes_are_reachable_from_roots ... ok
[INFO] [stdout] test roots_have_no_parent ... ok
[INFO] [stdout] test contains_all_data_in_correct_order ... ok
[INFO] [stdout] test roots_are_subset_of_nodes ... ok
[INFO] [stdout] test mts_is_deterministic ... ok
[INFO] [stderr]    Doc-tests merkle-tree-stream
[INFO] [stdout] test hashes_change_when_data_is_changed ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 5) ... ok
[INFO] [stdout] test src/lib.rs - MerkleTreeStream (line 106) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f063f0eb194599c8bbac7a26d8b1523b5fd3fa677bddfd7438b6737762afe048", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f063f0eb194599c8bbac7a26d8b1523b5fd3fa677bddfd7438b6737762afe048", kill_on_drop: false }`
[INFO] [stdout] f063f0eb194599c8bbac7a26d8b1523b5fd3fa677bddfd7438b6737762afe048