[INFO] fetching crate mft 0.5.3...
[INFO] checking mft-0.5.3 against 1.55.0 for beta-1.56-3
[INFO] extracting crate mft 0.5.3 into /workspace/builds/worker-26/source
[INFO] validating manifest of crates.io crate mft 0.5.3 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mft 0.5.3
[INFO] finished tweaking crates.io crate mft 0.5.3
[INFO] tweaked toml for crates.io crate mft 0.5.3 written to /workspace/builds/worker-26/source/Cargo.toml
[INFO] crate crates.io crate mft 0.5.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded indoc-impl v0.3.5
[INFO] [stderr]   Downloaded float-cmp v0.6.0
[INFO] [stderr]   Downloaded thiserror-impl v1.0.15
[INFO] [stderr]   Downloaded unindent v0.1.5
[INFO] [stderr]   Downloaded simplelog v0.7.5
[INFO] [stderr]   Downloaded indoc v0.3.5
[INFO] [stderr]   Downloaded thiserror v1.0.15
[INFO] [stderr]   Downloaded escargot v0.5.0
[INFO] [stderr]   Downloaded assert_cmd v0.12.2
[INFO] [stderr]   Downloaded rexpect v0.3.0
[INFO] [stderr]   Downloaded num-derive v0.3.0
[INFO] [stderr]   Downloaded predicates v1.0.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 85cbd1851a2dd6f1429d3b7422d586610e7c0dc166154ce1462d95b2c2a00a93
[INFO] running `Command { std: "docker" "start" "-a" "85cbd1851a2dd6f1429d3b7422d586610e7c0dc166154ce1462d95b2c2a00a93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "85cbd1851a2dd6f1429d3b7422d586610e7c0dc166154ce1462d95b2c2a00a93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85cbd1851a2dd6f1429d3b7422d586610e7c0dc166154ce1462d95b2c2a00a93", kill_on_drop: false }`
[INFO] [stdout] 85cbd1851a2dd6f1429d3b7422d586610e7c0dc166154ce1462d95b2c2a00a93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-26/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7741c10115a54225145fa8107635f840dadd5bc080f8fe97cafe09bce901e456
[INFO] running `Command { std: "docker" "start" "-a" "7741c10115a54225145fa8107635f840dadd5bc080f8fe97cafe09bce901e456", kill_on_drop: false }`
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[INFO] [stderr]    Compiling libc v0.2.69
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[INFO] [stderr]    Compiling serde_derive v1.0.106
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[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking criterion v0.3.1
[INFO] [stderr]    Compiling mft v0.5.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `count` is assigned to, but never used
[INFO] [stdout]   --> src/benches/benchmark.rs:11:13
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut count = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_count` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.25s
[INFO] running `Command { std: "docker" "inspect" "7741c10115a54225145fa8107635f840dadd5bc080f8fe97cafe09bce901e456", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7741c10115a54225145fa8107635f840dadd5bc080f8fe97cafe09bce901e456", kill_on_drop: false }`
[INFO] [stdout] 7741c10115a54225145fa8107635f840dadd5bc080f8fe97cafe09bce901e456
