[INFO] cloning repository https://github.com/chambaoo/rust-learning-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chambaoo/rust-learning-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] af7aca2c39d9429ff87eaae2c2739375e6ce9c4c
[INFO] checking chambaoo/rust-learning-playground against try#d7b15db413fd2070daa09a2c5b7f2ab38417429f for pr-144544
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchambaoo%2Frust-learning-playground" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/chambaoo/rust-learning-playground
[INFO] finished tweaking git repo https://github.com/chambaoo/rust-learning-playground
[INFO] tweaked toml for git repo https://github.com/chambaoo/rust-learning-playground written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/chambaoo/rust-learning-playground on toolchain d7b15db413fd2070daa09a2c5b7f2ab38417429f
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/chambaoo/rust-learning-playground 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" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "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-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2a8477aeda99c742ee4b13105f54ff4ffcd6f0b065c7670d73887c66ff7c4a68
[INFO] running `Command { std: "docker" "start" "-a" "2a8477aeda99c742ee4b13105f54ff4ffcd6f0b065c7670d73887c66ff7c4a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2a8477aeda99c742ee4b13105f54ff4ffcd6f0b065c7670d73887c66ff7c4a68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a8477aeda99c742ee4b13105f54ff4ffcd6f0b065c7670d73887c66ff7c4a68", kill_on_drop: false }`
[INFO] [stdout] 2a8477aeda99c742ee4b13105f54ff4ffcd6f0b065c7670d73887c66ff7c4a68
[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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+d7b15db413fd2070daa09a2c5b7f2ab38417429f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67a895cded48495486ae36bb956942fc0a767802fae8bf7e1a191e1c849edf7b
[INFO] running `Command { std: "docker" "start" "-a" "67a895cded48495486ae36bb956942fc0a767802fae8bf7e1a191e1c849edf7b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-learning-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |     if let Some(color) = string_to_color_token("red") {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]    --> src/main.rs:246:17
[INFO] [stdout]     |
[INFO] [stdout] 246 |     if let Some(color) = string_to_color_token("red") {
[INFO] [stdout]     |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/main.rs:123:13
[INFO] [stdout]     |
[INFO] [stdout] 123 |         Hex(String),
[INFO] [stdout]     |         --- ^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Color` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 123 -         Hex(String),
[INFO] [stdout] 123 +         Hex(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "67a895cded48495486ae36bb956942fc0a767802fae8bf7e1a191e1c849edf7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67a895cded48495486ae36bb956942fc0a767802fae8bf7e1a191e1c849edf7b", kill_on_drop: false }`
[INFO] [stdout] 67a895cded48495486ae36bb956942fc0a767802fae8bf7e1a191e1c849edf7b