[INFO] cloning repository https://github.com/KOBA789/ch789-reed-solomon
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/KOBA789/ch789-reed-solomon" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKOBA789%2Fch789-reed-solomon", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKOBA789%2Fch789-reed-solomon'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f3376bf757d6057f37995f12646c4aab953d65f
[INFO] checking KOBA789/ch789-reed-solomon against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKOBA789%2Fch789-reed-solomon" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KOBA789/ch789-reed-solomon on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KOBA789/ch789-reed-solomon
[INFO] finished tweaking git repo https://github.com/KOBA789/ch789-reed-solomon
[INFO] tweaked toml for git repo https://github.com/KOBA789/ch789-reed-solomon written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/KOBA789/ch789-reed-solomon 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking KOBA789/ch789-reed-solomon against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FKOBA789%2Fch789-reed-solomon" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/KOBA789/ch789-reed-solomon on toolchain 047472f299946caf090d1b5608ae4bd9f0416256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/KOBA789/ch789-reed-solomon
[INFO] finished tweaking git repo https://github.com/KOBA789/ch789-reed-solomon
[INFO] tweaked toml for git repo https://github.com/KOBA789/ch789-reed-solomon written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/KOBA789/ch789-reed-solomon 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "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/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7a40f436a97164d118de5c6b6e0cfe6f06d68885323b1adb394865ed5ae3b76d
[INFO] running `Command { std: "docker" "start" "-a" "7a40f436a97164d118de5c6b6e0cfe6f06d68885323b1adb394865ed5ae3b76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a40f436a97164d118de5c6b6e0cfe6f06d68885323b1adb394865ed5ae3b76d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a40f436a97164d118de5c6b6e0cfe6f06d68885323b1adb394865ed5ae3b76d", kill_on_drop: false }`
[INFO] [stdout] 7a40f436a97164d118de5c6b6e0cfe6f06d68885323b1adb394865ed5ae3b76d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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 -Ddereferencing_mut_binding" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51280d8ed914cbb6ec057cbb877dde7658876eddbca768e2c2a00f6be44a3de3
[INFO] running `Command { std: "docker" "start" "-a" "51280d8ed914cbb6ec057cbb877dde7658876eddbca768e2c2a00f6be44a3de3", kill_on_drop: false }`
[INFO] [stderr]     Checking once_cell v1.18.0
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking ch789-reed-solomon v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `inv` is never used
[INFO] [stdout]   --> src/main.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | impl AlphaPoly {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 52 |     fn inv(self) -> AlphaPoly {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `div_mod`, `assign_alpha`, and `gcd` are never used
[INFO] [stdout]    --> src/main.rs:147:8
[INFO] [stdout]     |
[INFO] [stdout] 146 | impl Poly {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 147 |     fn div_mod(self, rhs: Self) -> (Poly, Poly) {
[INFO] [stdout]     |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 170 |     fn assign_alpha(self, alpha: AlphaPoly) -> AlphaPoly {
[INFO] [stdout]     |        ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 180 |     fn gcd(self, rhs: Self, t: usize, a_2: Poly, a_1: Poly) -> (Poly, Poly) {
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/main.rs:399:13
[INFO] [stdout]     |
[INFO] [stdout] 399 |         let rhs = Poly(vec![ALPHA_TABLE[0]]);
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lhs`
[INFO] [stdout]    --> src/main.rs:400:13
[INFO] [stdout]     |
[INFO] [stdout] 400 |         let lhs = Poly(vec![ALPHA_TABLE[0]]);
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_lhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rhs`
[INFO] [stdout]    --> src/main.rs:403:13
[INFO] [stdout]     |
[INFO] [stdout] 403 |         let rhs = Poly(vec![ALPHA_TABLE[100], ALPHA_TABLE[3]])
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `lhs`
[INFO] [stdout]    --> src/main.rs:405:13
[INFO] [stdout]     |
[INFO] [stdout] 405 |         let lhs = Poly(vec![ALPHA_TABLE[100], ALPHA_TABLE[3]])
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_lhs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "51280d8ed914cbb6ec057cbb877dde7658876eddbca768e2c2a00f6be44a3de3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51280d8ed914cbb6ec057cbb877dde7658876eddbca768e2c2a00f6be44a3de3", kill_on_drop: false }`
[INFO] [stdout] 51280d8ed914cbb6ec057cbb877dde7658876eddbca768e2c2a00f6be44a3de3