[INFO] cloning repository https://github.com/sumit03guha/rust-by-example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sumit03guha/rust-by-example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsumit03guha%2Frust-by-example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsumit03guha%2Frust-by-example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b3ee242ad163a1439fb3b12a69fef903fba05f99
[INFO] checking sumit03guha/rust-by-example against 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d for pr-159598
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsumit03guha%2Frust-by-example" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sumit03guha/rust-by-example
[INFO] finished tweaking git repo https://github.com/sumit03guha/rust-by-example
[INFO] tweaked toml for git repo https://github.com/sumit03guha/rust-by-example written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sumit03guha/rust-by-example on toolchain 4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sumit03guha/rust-by-example 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" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "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-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8
[INFO] running `Command { std: "docker" "start" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8" "/opt/rustwide/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8" "/opt/rustwide/cargo-home/bin/cargo" "+4a9d5368df6450bbd2fc8dde4508c3e5d83bb19d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking rust-by-example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/bin/from-into.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Letter {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     value: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Letter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function` is never used
[INFO] [stdout]  --> src/bin/closures.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn function(input: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function` is never used
[INFO] [stdout]  --> src/bin/closures.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 |     fn function(input: i32) -> i32 {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age_2`
[INFO] [stdout]   --> src/bin/partial-move.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let age_2 = id_2.1;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_age_2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/bin/loop-return.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             'inner: loop {
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]   --> src/bin/loop-return.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             'inner: loop {
[INFO] [stdout]    |             ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_labels)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age_2`
[INFO] [stdout]   --> src/bin/partial-move.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let age_2 = id_2.1;
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_age_2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]  --> src/bin/from-into.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Letter {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] 3 |     value: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Letter` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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 0.22s
[INFO] running `Command { std: "docker" "inspect" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8", kill_on_drop: false }`
[INFO] [stdout] 410cde7cf26805aca3b0244599cdb56979ccdd9fac202007119fbf7021370de8
