[INFO] cloning repository https://github.com/jonaylor89/pngcheck
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jonaylor89/pngcheck" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonaylor89%2Fpngcheck", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonaylor89%2Fpngcheck'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c0c5403228ffd16edb2efba123831e6f00f53072
[INFO] testing jonaylor89/pngcheck against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonaylor89%2Fpngcheck" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jonaylor89/pngcheck
[INFO] finished tweaking git repo https://github.com/jonaylor89/pngcheck
[INFO] tweaked toml for git repo https://github.com/jonaylor89/pngcheck written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jonaylor89/pngcheck on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jonaylor89/pngcheck 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 18aca261438e328345609e404dd4c71071d36640710f8ea08cbd72324d59fe93
[INFO] running `Command { std: "docker" "start" "-a" "18aca261438e328345609e404dd4c71071d36640710f8ea08cbd72324d59fe93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18aca261438e328345609e404dd4c71071d36640710f8ea08cbd72324d59fe93", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18aca261438e328345609e404dd4c71071d36640710f8ea08cbd72324d59fe93", kill_on_drop: false }`
[INFO] [stdout] 18aca261438e328345609e404dd4c71071d36640710f8ea08cbd72324d59fe93
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1c379de030dd4535f730c0071dcc0d111ef7b209b12164f6ba7885dc4c66d428
[INFO] running `Command { std: "docker" "start" "-a" "1c379de030dd4535f730c0071dcc0d111ef7b209b12164f6ba7885dc4c66d428", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.177
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling pngcheck v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `global_max_error` is never read
[INFO] [stdout]     --> src/main.rs:1106:13
[INFO] [stdout]      |
[INFO] [stdout] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `Command { std: "docker" "inspect" "1c379de030dd4535f730c0071dcc0d111ef7b209b12164f6ba7885dc4c66d428", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1c379de030dd4535f730c0071dcc0d111ef7b209b12164f6ba7885dc4c66d428", kill_on_drop: false }`
[INFO] [stdout] 1c379de030dd4535f730c0071dcc0d111ef7b209b12164f6ba7885dc4c66d428
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 31692d3c25b1add5b82c279f8413dea76c4aa6632c7a11df03c15dcf39238337
[INFO] running `Command { std: "docker" "start" "-a" "31692d3c25b1add5b82c279f8413dea76c4aa6632c7a11df03c15dcf39238337", kill_on_drop: false }`
[INFO] [stderr]    Compiling pngcheck v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `global_max_error` is never read
[INFO] [stdout]     --> src/main.rs:1106:13
[INFO] [stdout]      |
[INFO] [stdout] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stdout]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = help: maybe it is overwritten before being read?
[INFO] [stdout]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "31692d3c25b1add5b82c279f8413dea76c4aa6632c7a11df03c15dcf39238337", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "31692d3c25b1add5b82c279f8413dea76c4aa6632c7a11df03c15dcf39238337", kill_on_drop: false }`
[INFO] [stdout] 31692d3c25b1add5b82c279f8413dea76c4aa6632c7a11df03c15dcf39238337
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a4e9f603432306a6c5fa3d34b92ac01e448dd034de383b183871324afb3fd816
[INFO] running `Command { std: "docker" "start" "-a" "a4e9f603432306a6c5fa3d34b92ac01e448dd034de383b183871324afb3fd816", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `global_max_error` is never read
[INFO] [stderr]     --> src/main.rs:1106:13
[INFO] [stderr]      |
[INFO] [stderr] 1106 |             global_max_error = global_max_error.max(err);
[INFO] [stderr]      |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]      |
[INFO] [stderr]      = help: maybe it is overwritten before being read?
[INFO] [stderr]      = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `pngcheck` (bin "pngcheck" test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/pngcheck-0a61caaed18ba192)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a4e9f603432306a6c5fa3d34b92ac01e448dd034de383b183871324afb3fd816", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4e9f603432306a6c5fa3d34b92ac01e448dd034de383b183871324afb3fd816", kill_on_drop: false }`
[INFO] [stdout] a4e9f603432306a6c5fa3d34b92ac01e448dd034de383b183871324afb3fd816