[INFO] cloning repository https://github.com/lukehinds/proof-of-work
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lukehinds/proof-of-work" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukehinds%2Fproof-of-work", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukehinds%2Fproof-of-work'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] fa5019e7fd615fb389cffc6552a34b2ea2c1be4d
[INFO] checking lukehinds/proof-of-work against try#87f2ecc56b5f6032b075c8934ebc77f28d57183c for pr-148190
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flukehinds%2Fproof-of-work" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/lukehinds/proof-of-work
[INFO] finished tweaking git repo https://github.com/lukehinds/proof-of-work
[INFO] tweaked toml for git repo https://github.com/lukehinds/proof-of-work written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/lukehinds/proof-of-work on toolchain 87f2ecc56b5f6032b075c8934ebc77f28d57183c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/lukehinds/proof-of-work 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" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 97b2c7cc6e535cd80afa86fd867ba97c2ac938f2931628b001a0f9b31fe70683
[INFO] running `Command { std: "docker" "start" "-a" "97b2c7cc6e535cd80afa86fd867ba97c2ac938f2931628b001a0f9b31fe70683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97b2c7cc6e535cd80afa86fd867ba97c2ac938f2931628b001a0f9b31fe70683", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97b2c7cc6e535cd80afa86fd867ba97c2ac938f2931628b001a0f9b31fe70683", kill_on_drop: false }`
[INFO] [stdout] 97b2c7cc6e535cd80afa86fd867ba97c2ac938f2931628b001a0f9b31fe70683
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+87f2ecc56b5f6032b075c8934ebc77f28d57183c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89c67e78c6f681ffcd56677132424e4ccf6c0e98b50f77206c7aa75d722942e1
[INFO] running `Command { std: "docker" "start" "-a" "89c67e78c6f681ffcd56677132424e4ccf6c0e98b50f77206c7aa75d722942e1", kill_on_drop: false }`
[INFO] [stderr]     Checking cpufeatures v0.2.2
[INFO] [stderr]     Checking block-buffer v0.10.2
[INFO] [stderr]     Checking crypto-common v0.1.6
[INFO] [stderr]     Checking digest v0.10.3
[INFO] [stderr]     Checking sha2 v0.10.2
[INFO] [stderr]     Checking nonce-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.53s
[INFO] running `Command { std: "docker" "inspect" "89c67e78c6f681ffcd56677132424e4ccf6c0e98b50f77206c7aa75d722942e1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89c67e78c6f681ffcd56677132424e4ccf6c0e98b50f77206c7aa75d722942e1", kill_on_drop: false }`
[INFO] [stdout] 89c67e78c6f681ffcd56677132424e4ccf6c0e98b50f77206c7aa75d722942e1