[INFO] cloning repository https://github.com/itsmenewbie03/rs-lyrics-player
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/itsmenewbie03/rs-lyrics-player" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmenewbie03%2Frs-lyrics-player", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmenewbie03%2Frs-lyrics-player'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4abcc57aa8de6cef062a09906aac1587b456e0b2
[INFO] checking itsmenewbie03/rs-lyrics-player against try#5785402183672f7786e9dc343d7b435bdaf4a4bc for pr-138001
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fitsmenewbie03%2Frs-lyrics-player" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/itsmenewbie03/rs-lyrics-player on toolchain 5785402183672f7786e9dc343d7b435bdaf4a4bc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/itsmenewbie03/rs-lyrics-player
[INFO] finished tweaking git repo https://github.com/itsmenewbie03/rs-lyrics-player
[INFO] tweaked toml for git repo https://github.com/itsmenewbie03/rs-lyrics-player written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/itsmenewbie03/rs-lyrics-player 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" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a634b5476d6c30613ba7df310ed8627896d4fa1c37fc40f4d08a5d5719de8980
[INFO] running `Command { std: "docker" "start" "-a" "a634b5476d6c30613ba7df310ed8627896d4fa1c37fc40f4d08a5d5719de8980", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a634b5476d6c30613ba7df310ed8627896d4fa1c37fc40f4d08a5d5719de8980", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a634b5476d6c30613ba7df310ed8627896d4fa1c37fc40f4d08a5d5719de8980", kill_on_drop: false }`
[INFO] [stdout] a634b5476d6c30613ba7df310ed8627896d4fa1c37fc40f4d08a5d5719de8980
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+5785402183672f7786e9dc343d7b435bdaf4a4bc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6a396495e794a0b05c467ccb740e5bd527453fb8a1b84c21c409df0ff31c52a3
[INFO] running `Command { std: "docker" "start" "-a" "6a396495e794a0b05c467ccb740e5bd527453fb8a1b84c21c409df0ff31c52a3", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.6.4
[INFO] [stderr]     Checking regex-syntax v0.8.2
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking figlet-rs v0.1.5
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking aho-corasick v1.1.2
[INFO] [stderr]     Checking regex-automata v0.4.3
[INFO] [stderr]     Checking regex v1.10.2
[INFO] [stderr]     Checking fancy-regex v0.12.0
[INFO] [stderr]     Checking rs-lyrics-player v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let mut lines: Vec<Line> = lyrics
[INFO] [stdout]    |                     ----^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:53:21
[INFO] [stdout]    |
[INFO] [stdout] 53 |                 let mut lines: Vec<Line> = lyrics
[INFO] [stdout]    |                     ----^^^^^
[INFO] [stdout]    |                     |
[INFO] [stdout]    |                     help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.92s
[INFO] running `Command { std: "docker" "inspect" "6a396495e794a0b05c467ccb740e5bd527453fb8a1b84c21c409df0ff31c52a3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6a396495e794a0b05c467ccb740e5bd527453fb8a1b84c21c409df0ff31c52a3", kill_on_drop: false }`
[INFO] [stdout] 6a396495e794a0b05c467ccb740e5bd527453fb8a1b84c21c409df0ff31c52a3