[INFO] fetching crate mtpng 0.3.5...
[INFO] checking mtpng-0.3.5 against try#8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346 for pr-86194
[INFO] extracting crate mtpng 0.3.5 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate mtpng 0.3.5 on toolchain 8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mtpng 0.3.5
[INFO] finished tweaking crates.io crate mtpng 0.3.5
[INFO] tweaked toml for crates.io crate mtpng 0.3.5 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate mtpng 0.3.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded crc v1.8.1
[INFO] [stderr]   Downloaded vcpkg v0.2.12
[INFO] [stderr]   Downloaded deflate v0.8.6
[INFO] [stderr]   Downloaded adler32 v1.2.0
[INFO] [stderr]   Downloaded build_const v0.2.2
[INFO] [stderr]   Downloaded png v0.16.8
[INFO] [stderr]   Downloaded const_fn v0.4.7
[INFO] [stderr]   Downloaded libz-sys v1.1.2
[INFO] [stderr]   Downloaded time v0.2.26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1de3259383a235f555d4ccdc0223f71b4f591293d610e840557e4bf56cc6a174
[INFO] running `Command { std: "docker" "start" "-a" "1de3259383a235f555d4ccdc0223f71b4f591293d610e840557e4bf56cc6a174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1de3259383a235f555d4ccdc0223f71b4f591293d610e840557e4bf56cc6a174", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1de3259383a235f555d4ccdc0223f71b4f591293d610e840557e4bf56cc6a174", kill_on_drop: false }`
[INFO] [stdout] 1de3259383a235f555d4ccdc0223f71b4f591293d610e840557e4bf56cc6a174
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+8552849d5ae3b6c66b89a0ac2e9c1e3ef5cde346" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f4fcc18fa14aafe0ab520afd69c853779f7b9e21e359d94bd9b7ad2b517b6b3
[INFO] running `Command { std: "docker" "start" "-a" "9f4fcc18fa14aafe0ab520afd69c853779f7b9e21e359d94bd9b7ad2b517b6b3", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling build_const v0.2.2
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling libz-sys v1.1.2
[INFO] [stderr]     Checking mtpng v0.3.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `finished`
[INFO] [stdout]    --> src/deflate.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     finished: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `finished`
[INFO] [stdout]    --> src/deflate.rs:138:5
[INFO] [stdout]     |
[INFO] [stdout] 138 |     finished: bool,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.79s
[INFO] running `Command { std: "docker" "inspect" "9f4fcc18fa14aafe0ab520afd69c853779f7b9e21e359d94bd9b7ad2b517b6b3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f4fcc18fa14aafe0ab520afd69c853779f7b9e21e359d94bd9b7ad2b517b6b3", kill_on_drop: false }`
[INFO] [stdout] 9f4fcc18fa14aafe0ab520afd69c853779f7b9e21e359d94bd9b7ad2b517b6b3