[INFO] fetching crate merkletree-rs 0.0.3...
[INFO] checking merkletree-rs-0.0.3 against master#c9228570668803e3e6402770d55f23a12c9ae686 for pr-79472
[INFO] extracting crate merkletree-rs 0.0.3 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate merkletree-rs 0.0.3 on toolchain c9228570668803e3e6402770d55f23a12c9ae686
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merkletree-rs 0.0.3
[INFO] finished tweaking crates.io crate merkletree-rs 0.0.3
[INFO] tweaked toml for crates.io crate merkletree-rs 0.0.3 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b1130eb7c682c9503e5851ac2ccb6b134c1b6d568c2c3aae3558fd549dbc9b0c
[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" "b1130eb7c682c9503e5851ac2ccb6b134c1b6d568c2c3aae3558fd549dbc9b0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b1130eb7c682c9503e5851ac2ccb6b134c1b6d568c2c3aae3558fd549dbc9b0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1130eb7c682c9503e5851ac2ccb6b134c1b6d568c2c3aae3558fd549dbc9b0c", kill_on_drop: false }`
[INFO] [stdout] b1130eb7c682c9503e5851ac2ccb6b134c1b6d568c2c3aae3558fd549dbc9b0c
[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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+c9228570668803e3e6402770d55f23a12c9ae686" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0c74598a2947c92ad0bbd0bc22d658e0be069ca2b4e88f3a447b0f58396b0a13
[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" "0c74598a2947c92ad0bbd0bc22d658e0be069ca2b4e88f3a447b0f58396b0a13", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling getrandom v0.1.15
[INFO] [stderr]     Checking integer-encoding v1.1.5
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking arrayref v0.3.6
[INFO] [stderr]     Checking bitreader v0.3.2
[INFO] [stderr]     Checking snap v0.2.5
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking rusty-leveldb v0.2.7
[INFO] [stderr]     Checking merkletree-rs v0.0.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 10.42s
[INFO] running `Command { std: "docker" "inspect" "0c74598a2947c92ad0bbd0bc22d658e0be069ca2b4e88f3a447b0f58396b0a13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c74598a2947c92ad0bbd0bc22d658e0be069ca2b4e88f3a447b0f58396b0a13", kill_on_drop: false }`
[INFO] [stdout] 0c74598a2947c92ad0bbd0bc22d658e0be069ca2b4e88f3a447b0f58396b0a13