[INFO] cloning repository https://github.com/kaushik-kaizoku/rust_bookrack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kaushik-kaizoku/rust_bookrack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaushik-kaizoku%2Frust_bookrack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaushik-kaizoku%2Frust_bookrack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 23b8ea94f6c276828e716cb43f4eb19404cece87
[INFO] checking kaushik-kaizoku/rust_bookrack against master#8365fcb2b840c95eeb0bc377af8bd498fad22245 for pr-145604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkaushik-kaizoku%2Frust_bookrack" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/kaushik-kaizoku/rust_bookrack
[INFO] finished tweaking git repo https://github.com/kaushik-kaizoku/rust_bookrack
[INFO] tweaked toml for git repo https://github.com/kaushik-kaizoku/rust_bookrack written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/kaushik-kaizoku/rust_bookrack on toolchain 8365fcb2b840c95eeb0bc377af8bd498fad22245
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/kaushik-kaizoku/rust_bookrack 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" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50ba2aa872a76ab306731b27424719ae2e648e5ce67dda82b0624a765a1ccab5
[INFO] running `Command { std: "docker" "start" "-a" "50ba2aa872a76ab306731b27424719ae2e648e5ce67dda82b0624a765a1ccab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50ba2aa872a76ab306731b27424719ae2e648e5ce67dda82b0624a765a1ccab5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50ba2aa872a76ab306731b27424719ae2e648e5ce67dda82b0624a765a1ccab5", kill_on_drop: false }`
[INFO] [stdout] 50ba2aa872a76ab306731b27424719ae2e648e5ce67dda82b0624a765a1ccab5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8365fcb2b840c95eeb0bc377af8bd498fad22245" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] df4a34f141503d6e5a2e7e39db1f3f4b107844f8dc2caba5bee3d7082dd3b1f9
[INFO] running `Command { std: "docker" "start" "-a" "df4a34f141503d6e5a2e7e39db1f3f4b107844f8dc2caba5bee3d7082dd3b1f9", kill_on_drop: false }`
[INFO] [stderr]     Checking cli_library v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let mut book = Book {
[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: fields `title` and `author` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Book {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 5 |     id: u32,
[INFO] [stdout] 6 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Book` 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] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:77:21
[INFO] [stdout]    |
[INFO] [stdout] 77 |                 let mut book = Book {
[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: fields `title` and `author` are never read
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Book {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 5 |     id: u32,
[INFO] [stdout] 6 |     title: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Book` 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] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "df4a34f141503d6e5a2e7e39db1f3f4b107844f8dc2caba5bee3d7082dd3b1f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df4a34f141503d6e5a2e7e39db1f3f4b107844f8dc2caba5bee3d7082dd3b1f9", kill_on_drop: false }`
[INFO] [stdout] df4a34f141503d6e5a2e7e39db1f3f4b107844f8dc2caba5bee3d7082dd3b1f9