[INFO] cloning repository https://github.com/iluvpy/png-parse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/iluvpy/png-parse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fpng-parse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fpng-parse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0b3f5c1d5a42857ccdcb85d0e21b786d02e8a7b2
[INFO] checking iluvpy/png-parse against master#419b3e2d3e350822550eee0e82eeded4d324d584 for pr-135536
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Filuvpy%2Fpng-parse" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/iluvpy/png-parse on toolchain 419b3e2d3e350822550eee0e82eeded4d324d584
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/iluvpy/png-parse
[INFO] finished tweaking git repo https://github.com/iluvpy/png-parse
[INFO] tweaked toml for git repo https://github.com/iluvpy/png-parse written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/iluvpy/png-parse 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" "+419b3e2d3e350822550eee0e82eeded4d324d584" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3826fa11e1e2809a7e377f3b5970090148ebfb64d5c8540c89525048427c2a44
[INFO] running `Command { std: "docker" "start" "-a" "3826fa11e1e2809a7e377f3b5970090148ebfb64d5c8540c89525048427c2a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3826fa11e1e2809a7e377f3b5970090148ebfb64d5c8540c89525048427c2a44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3826fa11e1e2809a7e377f3b5970090148ebfb64d5c8540c89525048427c2a44", kill_on_drop: false }`
[INFO] [stdout] 3826fa11e1e2809a7e377f3b5970090148ebfb64d5c8540c89525048427c2a44
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+419b3e2d3e350822550eee0e82eeded4d324d584" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4904e9eab9b292e94592f220f36fb8d578e2882b737aafe218065d3d42d7e9cf
[INFO] running `Command { std: "docker" "start" "-a" "4904e9eab9b292e94592f220f36fb8d578e2882b737aafe218065d3d42d7e9cf", kill_on_drop: false }`
[INFO] [stderr]     Checking png-parse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `buffer` is never read
[INFO] [stdout]  --> src/png.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct PNGFile {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub buffer: Vec<u8>,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `buffer` is never read
[INFO] [stdout]  --> src/png.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub struct PNGFile {
[INFO] [stdout]   |            ------- field in this struct
[INFO] [stdout] 7 |     pub buffer: Vec<u8>,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "4904e9eab9b292e94592f220f36fb8d578e2882b737aafe218065d3d42d7e9cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4904e9eab9b292e94592f220f36fb8d578e2882b737aafe218065d3d42d7e9cf", kill_on_drop: false }`
[INFO] [stdout] 4904e9eab9b292e94592f220f36fb8d578e2882b737aafe218065d3d42d7e9cf