[INFO] fetching crate collatz 0.5.0...
[INFO] testing collatz-0.5.0 against try#722e1797249a965b6335aebd65d777f917e498f1 for pr-91031
[INFO] extracting crate collatz 0.5.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate collatz 0.5.0 on toolchain 722e1797249a965b6335aebd65d777f917e498f1
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate collatz 0.5.0
[INFO] finished tweaking crates.io crate collatz 0.5.0
[INFO] tweaked toml for crates.io crate collatz 0.5.0 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate collatz 0.5.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rgb v0.8.27
[INFO] [stderr]   Downloaded meval v0.2.0
[INFO] [stderr]   Downloaded drawille v0.3.0
[INFO] [stderr]   Downloaded textplots v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 49025065d2c1983d8f8688285dc7e23e61656b4a18744da8a6fb8d280136a755
[INFO] running `Command { std: "docker" "start" "-a" "49025065d2c1983d8f8688285dc7e23e61656b4a18744da8a6fb8d280136a755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "49025065d2c1983d8f8688285dc7e23e61656b4a18744da8a6fb8d280136a755", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49025065d2c1983d8f8688285dc7e23e61656b4a18744da8a6fb8d280136a755", kill_on_drop: false }`
[INFO] [stdout] 49025065d2c1983d8f8688285dc7e23e61656b4a18744da8a6fb8d280136a755
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9767d8e9812f8f0b625fc712f3b993e56c82fc5826d841d8cf170f69302c31fd
[INFO] running `Command { std: "docker" "start" "-a" "9767d8e9812f8f0b625fc712f3b993e56c82fc5826d841d8cf170f69302c31fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-complex v0.4.0
[INFO] [stderr]    Compiling num v0.4.0
[INFO] [stderr]    Compiling collatz v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.09s
[INFO] running `Command { std: "docker" "inspect" "9767d8e9812f8f0b625fc712f3b993e56c82fc5826d841d8cf170f69302c31fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9767d8e9812f8f0b625fc712f3b993e56c82fc5826d841d8cf170f69302c31fd", kill_on_drop: false }`
[INFO] [stdout] 9767d8e9812f8f0b625fc712f3b993e56c82fc5826d841d8cf170f69302c31fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] eaedeb49f68106952f176812a340ce55d0e2bdc73c1e8a939b3a21d42917988e
[INFO] running `Command { std: "docker" "start" "-a" "eaedeb49f68106952f176812a340ce55d0e2bdc73c1e8a939b3a21d42917988e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling nom v1.2.4
[INFO] [stderr]    Compiling bytemuck v1.7.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling rgb v0.8.27
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling meval v0.2.0
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling colored v2.0.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling drawille v0.3.0
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling structopt-derive v0.4.16
[INFO] [stderr]    Compiling structopt v0.3.23
[INFO] [stderr]    Compiling textplots v0.8.0
[INFO] [stderr]    Compiling collatz v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 10.65s
[INFO] running `Command { std: "docker" "inspect" "eaedeb49f68106952f176812a340ce55d0e2bdc73c1e8a939b3a21d42917988e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eaedeb49f68106952f176812a340ce55d0e2bdc73c1e8a939b3a21d42917988e", kill_on_drop: false }`
[INFO] [stdout] eaedeb49f68106952f176812a340ce55d0e2bdc73c1e8a939b3a21d42917988e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-81/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+722e1797249a965b6335aebd65d777f917e498f1" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e03e0c849ad5f783407ac51ee7fce41d532bbcd0a9d1139fe2bb0961bc0bdb3a
[INFO] running `Command { std: "docker" "start" "-a" "e03e0c849ad5f783407ac51ee7fce41d532bbcd0a9d1139fe2bb0961bc0bdb3a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.61s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/collatz-272f864683b04d10)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_get_steps ... ok
[INFO] [stdout] test tests::test_count_steps ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests collatz
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e03e0c849ad5f783407ac51ee7fce41d532bbcd0a9d1139fe2bb0961bc0bdb3a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e03e0c849ad5f783407ac51ee7fce41d532bbcd0a9d1139fe2bb0961bc0bdb3a", kill_on_drop: false }`
[INFO] [stdout] e03e0c849ad5f783407ac51ee7fce41d532bbcd0a9d1139fe2bb0961bc0bdb3a