[INFO] fetching crate number_prefix 0.4.0...
[INFO] checking number_prefix-0.4.0 against master#0599f3403366d9c57f0625e6de3af214b5042a90 for pr-87710
[INFO] extracting crate number_prefix 0.4.0 into /workspace/builds/worker-81/source
[INFO] validating manifest of crates.io crate number_prefix 0.4.0 on toolchain 0599f3403366d9c57f0625e6de3af214b5042a90
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate number_prefix 0.4.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate number_prefix 0.4.0
[INFO] tweaked toml for crates.io crate number_prefix 0.4.0 written to /workspace/builds/worker-81/source/Cargo.toml
[INFO] crate crates.io crate number_prefix 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2771ea8f64b1e9d1e9571497f3a21a4a4a8aa1349c2c0f391b432c22211b77d
[INFO] running `Command { std: "docker" "start" "-a" "f2771ea8f64b1e9d1e9571497f3a21a4a4a8aa1349c2c0f391b432c22211b77d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2771ea8f64b1e9d1e9571497f3a21a4a4a8aa1349c2c0f391b432c22211b77d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2771ea8f64b1e9d1e9571497f3a21a4a4a8aa1349c2c0f391b432c22211b77d", kill_on_drop: false }`
[INFO] [stdout] f2771ea8f64b1e9d1e9571497f3a21a4a4a8aa1349c2c0f391b432c22211b77d
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+0599f3403366d9c57f0625e6de3af214b5042a90" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4a4d3812315dd996f995b1693cc0c6679bbaad377c828fb451609b9fc5bbed29
[INFO] running `Command { std: "docker" "start" "-a" "4a4d3812315dd996f995b1693cc0c6679bbaad377c828fb451609b9fc5bbed29", kill_on_drop: false }`
[INFO] [stderr]     Checking number_prefix v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.52s
[INFO] running `Command { std: "docker" "inspect" "4a4d3812315dd996f995b1693cc0c6679bbaad377c828fb451609b9fc5bbed29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4a4d3812315dd996f995b1693cc0c6679bbaad377c828fb451609b9fc5bbed29", kill_on_drop: false }`
[INFO] [stdout] 4a4d3812315dd996f995b1693cc0c6679bbaad377c828fb451609b9fc5bbed29