[INFO] cloning repository https://github.com/Sourav-Bhattacharya10/rust_practice
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Sourav-Bhattacharya10/rust_practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSourav-Bhattacharya10%2Frust_practice", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSourav-Bhattacharya10%2Frust_practice'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9cfcb49ba13c61dcf6e73a048dfe476a914a5f5b
[INFO] checking Sourav-Bhattacharya10/rust_practice against try#2c4e58eac5a232e49065e517c1cf50b2715ccf85 for pr-140283
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSourav-Bhattacharya10%2Frust_practice" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Sourav-Bhattacharya10/rust_practice
[INFO] finished tweaking git repo https://github.com/Sourav-Bhattacharya10/rust_practice
[INFO] tweaked toml for git repo https://github.com/Sourav-Bhattacharya10/rust_practice written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Sourav-Bhattacharya10/rust_practice on toolchain 2c4e58eac5a232e49065e517c1cf50b2715ccf85
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Sourav-Bhattacharya10/rust_practice 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" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded getrandom v0.2.12
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 892ac0de69ad649eea56bd3346d7e62607e604d28f3044938268b0c3adc6c03e
[INFO] running `Command { std: "docker" "start" "-a" "892ac0de69ad649eea56bd3346d7e62607e604d28f3044938268b0c3adc6c03e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "892ac0de69ad649eea56bd3346d7e62607e604d28f3044938268b0c3adc6c03e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "892ac0de69ad649eea56bd3346d7e62607e604d28f3044938268b0c3adc6c03e", kill_on_drop: false }`
[INFO] [stdout] 892ac0de69ad649eea56bd3346d7e62607e604d28f3044938268b0c3adc6c03e
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+2c4e58eac5a232e49065e517c1cf50b2715ccf85" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a0d283cb42748f6c15ae60d053b2753179f8b531a4c5990e036800ee1d99619d
[INFO] running `Command { std: "docker" "start" "-a" "a0d283cb42748f6c15ae60d053b2753179f8b531a4c5990e036800ee1d99619d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]     Checking ppv-lite86 v0.2.17
[INFO] [stderr]     Checking getrandom v0.2.12
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking practice v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `width`, `height`, and `label` are never read
[INFO] [stdout]   --> src/trait_object.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Button {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 18 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 19 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 20 |     pub label: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width`, `height`, and `label` are never read
[INFO] [stdout]   --> src/trait_object.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub struct Button {
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] 18 |     pub width: u32,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 19 |     pub height: u32,
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 20 |     pub label: String,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `Command { std: "docker" "inspect" "a0d283cb42748f6c15ae60d053b2753179f8b531a4c5990e036800ee1d99619d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0d283cb42748f6c15ae60d053b2753179f8b531a4c5990e036800ee1d99619d", kill_on_drop: false }`
[INFO] [stdout] a0d283cb42748f6c15ae60d053b2753179f8b531a4c5990e036800ee1d99619d