[INFO] fetching crate perfer 0.1.2...
[INFO] checking perfer-0.1.2 against try#38c2997544af84fe301d600d6896397738163002 for pr-154205-1
[INFO] extracting crate perfer 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate perfer 0.1.2
[INFO] finished tweaking crates.io crate perfer 0.1.2
[INFO] tweaked toml for crates.io crate perfer 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate perfer 0.1.2 on toolchain 38c2997544af84fe301d600d6896397738163002
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate perfer 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 30c62034115755037c9babdd0f750840f74f87ce15590b43a50e6ce15ec9f8b7
[INFO] running `Command { std: "docker" "start" "-a" "30c62034115755037c9babdd0f750840f74f87ce15590b43a50e6ce15ec9f8b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "30c62034115755037c9babdd0f750840f74f87ce15590b43a50e6ce15ec9f8b7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "30c62034115755037c9babdd0f750840f74f87ce15590b43a50e6ce15ec9f8b7", kill_on_drop: false }`
[INFO] [stdout] 30c62034115755037c9babdd0f750840f74f87ce15590b43a50e6ce15ec9f8b7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+38c2997544af84fe301d600d6896397738163002" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d709233ba44b044eecbc79f41006b8ba07a9e119b1ac6a975b3d8cc3f4d47a3d
[INFO] running `Command { std: "docker" "start" "-a" "d709233ba44b044eecbc79f41006b8ba07a9e119b1ac6a975b3d8cc3f4d47a3d", kill_on_drop: false }`
[INFO] [stderr]     Checking utf8parse v0.2.1
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[INFO] [stderr]     Checking perfer v0.1.2 (/opt/rustwide/workdir)
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[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.97s
[INFO] running `Command { std: "docker" "inspect" "d709233ba44b044eecbc79f41006b8ba07a9e119b1ac6a975b3d8cc3f4d47a3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d709233ba44b044eecbc79f41006b8ba07a9e119b1ac6a975b3d8cc3f4d47a3d", kill_on_drop: false }`
[INFO] [stdout] d709233ba44b044eecbc79f41006b8ba07a9e119b1ac6a975b3d8cc3f4d47a3d