[INFO] fetching crate letter-sequence 0.6.0...
[INFO] checking letter-sequence-0.6.0 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate letter-sequence 0.6.0 into /workspace/builds/worker-106/source
[INFO] validating manifest of crates.io crate letter-sequence 0.6.0 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate letter-sequence 0.6.0
[INFO] finished tweaking crates.io crate letter-sequence 0.6.0
[INFO] tweaked toml for crates.io crate letter-sequence 0.6.0 written to /workspace/builds/worker-106/source/Cargo.toml
[INFO] crate crates.io crate letter-sequence 0.6.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0838289fd09f491afcbb61b919f831a208ee348514beaffedc47e5c85992e4f9
[INFO] running `Command { std: "docker" "start" "-a" "0838289fd09f491afcbb61b919f831a208ee348514beaffedc47e5c85992e4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0838289fd09f491afcbb61b919f831a208ee348514beaffedc47e5c85992e4f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0838289fd09f491afcbb61b919f831a208ee348514beaffedc47e5c85992e4f9", kill_on_drop: false }`
[INFO] [stdout] 0838289fd09f491afcbb61b919f831a208ee348514beaffedc47e5c85992e4f9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-106/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 53fb4d3f7f1f9cb34d79e32788727aab6f99f3dca215fdcf81a4d2f62e44fad5
[INFO] running `Command { std: "docker" "start" "-a" "53fb4d3f7f1f9cb34d79e32788727aab6f99f3dca215fdcf81a4d2f62e44fad5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking letter-sequence v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `cur`
[INFO] [stdout]   --> src/sequence.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let cur = self.inner.clone();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_cur`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new_unchecked`
[INFO] [stdout]   --> src/sequence.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 79 |     fn new_unchecked(inner: u64) -> Self {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cur`
[INFO] [stdout]   --> src/sequence.rs:38:7
[INFO] [stdout]    |
[INFO] [stdout] 38 |         let cur = self.inner.clone();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_cur`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/main.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 |     use std::ops::Add;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/main.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 |     use std::ops::Add;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.04s
[INFO] running `Command { std: "docker" "inspect" "53fb4d3f7f1f9cb34d79e32788727aab6f99f3dca215fdcf81a4d2f62e44fad5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53fb4d3f7f1f9cb34d79e32788727aab6f99f3dca215fdcf81a4d2f62e44fad5", kill_on_drop: false }`
[INFO] [stdout] 53fb4d3f7f1f9cb34d79e32788727aab6f99f3dca215fdcf81a4d2f62e44fad5