[INFO] fetching crate letter-sequence 0.6.0...
[INFO] building letter-sequence-0.6.0 against try#3930b75493eb88cd5431103dbdbc47eb760e9d9b for pr-97025
[INFO] extracting crate letter-sequence 0.6.0 into /workspace/builds/worker-99/source
[INFO] validating manifest of crates.io crate letter-sequence 0.6.0 on toolchain 3930b75493eb88cd5431103dbdbc47eb760e9d9b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3930b75493eb88cd5431103dbdbc47eb760e9d9b" "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-99/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" "+3930b75493eb88cd5431103dbdbc47eb760e9d9b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `strip` has been stabilized in the 1.58 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/profiles.html#strip-option for more information about using this feature.
[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-99/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+3930b75493eb88cd5431103dbdbc47eb760e9d9b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51dba3fa1dcff1ac0280a96e6f163a04d2dbdb1d1aad8947a73880ff4ccd08e2
[INFO] running `Command { std: "docker" "start" "-a" "51dba3fa1dcff1ac0280a96e6f163a04d2dbdb1d1aad8947a73880ff4ccd08e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51dba3fa1dcff1ac0280a96e6f163a04d2dbdb1d1aad8947a73880ff4ccd08e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51dba3fa1dcff1ac0280a96e6f163a04d2dbdb1d1aad8947a73880ff4ccd08e2", kill_on_drop: false }`
[INFO] [stdout] 51dba3fa1dcff1ac0280a96e6f163a04d2dbdb1d1aad8947a73880ff4ccd08e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-99/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+3930b75493eb88cd5431103dbdbc47eb760e9d9b" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 895f2ab4ed21b0debdf5fa16684ae833ab76bd7a2f2576f1d435a88bc453e221
[INFO] running `Command { std: "docker" "start" "-a" "895f2ab4ed21b0debdf5fa16684ae833ab76bd7a2f2576f1d435a88bc453e221", kill_on_drop: false }`
[INFO] [stderr] warning: the cargo feature `strip` has been stabilized in the 1.58 release and is no longer necessary to be listed in the manifest
[INFO] [stderr]   See https://doc.rust-lang.org/nightly/cargo/reference/profiles.html#strip-option for more information about using this feature.
[INFO] [stderr]    Compiling 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 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.01s
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "895f2ab4ed21b0debdf5fa16684ae833ab76bd7a2f2576f1d435a88bc453e221", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "895f2ab4ed21b0debdf5fa16684ae833ab76bd7a2f2576f1d435a88bc453e221", kill_on_drop: false }`
[INFO] [stdout] 895f2ab4ed21b0debdf5fa16684ae833ab76bd7a2f2576f1d435a88bc453e221