[INFO] fetching crate letter-sequence 0.4.0...
[INFO] checking letter-sequence-0.4.0 against master#db1fb85cff63ad5fffe435e17128f99f9e1d970c for pr-89056
[INFO] extracting crate letter-sequence 0.4.0 into /workspace/builds/worker-23/source
[INFO] validating manifest of crates.io crate letter-sequence 0.4.0 on toolchain db1fb85cff63ad5fffe435e17128f99f9e1d970c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate letter-sequence 0.4.0
[INFO] finished tweaking crates.io crate letter-sequence 0.4.0
[INFO] tweaked toml for crates.io crate letter-sequence 0.4.0 written to /workspace/builds/worker-23/source/Cargo.toml
[INFO] crate crates.io crate letter-sequence 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 29f4e663e015f74304a5ab9df3e8947041ab5d00d8bce3946c842e2320bc4c59
[INFO] running `Command { std: "docker" "start" "-a" "29f4e663e015f74304a5ab9df3e8947041ab5d00d8bce3946c842e2320bc4c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "29f4e663e015f74304a5ab9df3e8947041ab5d00d8bce3946c842e2320bc4c59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29f4e663e015f74304a5ab9df3e8947041ab5d00d8bce3946c842e2320bc4c59", kill_on_drop: false }`
[INFO] [stdout] 29f4e663e015f74304a5ab9df3e8947041ab5d00d8bce3946c842e2320bc4c59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-23/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+db1fb85cff63ad5fffe435e17128f99f9e1d970c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e28ec3932cf5cef7aac48543378d82424b96568166aeaf1f737bf739714b2a7
[INFO] running `Command { std: "docker" "start" "-a" "1e28ec3932cf5cef7aac48543378d82424b96568166aeaf1f737bf739714b2a7", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking letter-sequence v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `pad_char`
[INFO] [stdout]   --> src/sequence/renderer.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn pad_char(self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_unchecked`
[INFO] [stdout]   --> src/sequence.rs:42:5
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn new_unchecked(x: u64) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `A`
[INFO] [stdout]   --> src/lib.rs:21:1
[INFO] [stdout]    |
[INFO] [stdout] 21 | const A: u32  = 0;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pad_char`
[INFO] [stdout]   --> src/sequence/renderer.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     fn pad_char(self) -> char {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `Command { std: "docker" "inspect" "1e28ec3932cf5cef7aac48543378d82424b96568166aeaf1f737bf739714b2a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e28ec3932cf5cef7aac48543378d82424b96568166aeaf1f737bf739714b2a7", kill_on_drop: false }`
[INFO] [stdout] 1e28ec3932cf5cef7aac48543378d82424b96568166aeaf1f737bf739714b2a7