[INFO] fetching crate nahida 0.1.0...
[INFO] checking nahida-0.1.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate nahida 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate nahida 0.1.0
[INFO] finished tweaking crates.io crate nahida 0.1.0
[INFO] tweaked toml for crates.io crate nahida 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate nahida 0.1.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate nahida 0.1.0 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5157e3ccfbdc05b5d4a9afad121ae9c2e4563e4642b34abc0b26845895eaea8e
[INFO] running `Command { std: "docker" "start" "-a" "5157e3ccfbdc05b5d4a9afad121ae9c2e4563e4642b34abc0b26845895eaea8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5157e3ccfbdc05b5d4a9afad121ae9c2e4563e4642b34abc0b26845895eaea8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5157e3ccfbdc05b5d4a9afad121ae9c2e4563e4642b34abc0b26845895eaea8e", kill_on_drop: false }`
[INFO] [stdout] 5157e3ccfbdc05b5d4a9afad121ae9c2e4563e4642b34abc0b26845895eaea8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a4c87a455fc9a68918d40fe1953739bab45e333e139514a86935c989b372cb0f
[INFO] running `Command { std: "docker" "start" "-a" "a4c87a455fc9a68918d40fe1953739bab45e333e139514a86935c989b372cb0f", kill_on_drop: false }`
[INFO] [stderr]     Checking nahida v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `left` and `right` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Context<'a, T> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 17 |     left: &'a [T],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     right: &'a [T],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` 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: field `context` is never read
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct Location<'a, T> {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 24 |     context: Context<'a, T>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Location` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `left` and `right` are never read
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 16 | struct Context<'a, T> {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 17 |     left: &'a [T],
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 18 |     right: &'a [T],
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` 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: field `context` is never read
[INFO] [stdout]   --> src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct Location<'a, T> {
[INFO] [stdout]    |        -------- field in this struct
[INFO] [stdout] 24 |     context: Context<'a, T>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Location` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.17s
[INFO] running `Command { std: "docker" "inspect" "a4c87a455fc9a68918d40fe1953739bab45e333e139514a86935c989b372cb0f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4c87a455fc9a68918d40fe1953739bab45e333e139514a86935c989b372cb0f", kill_on_drop: false }`
[INFO] [stdout] a4c87a455fc9a68918d40fe1953739bab45e333e139514a86935c989b372cb0f