[INFO] cloning repository https://github.com/MicroJoe/rmatrix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MicroJoe/rmatrix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMicroJoe%2Frmatrix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMicroJoe%2Frmatrix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 52506714448a41de35353162c64de33266acce43
[INFO] checking MicroJoe/rmatrix against master#fc81ad22c453776de16acf9938976930cf8c9401 for pr-77325
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMicroJoe%2Frmatrix" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MicroJoe/rmatrix on toolchain fc81ad22c453776de16acf9938976930cf8c9401
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MicroJoe/rmatrix
[INFO] finished tweaking git repo https://github.com/MicroJoe/rmatrix
[INFO] tweaked toml for git repo https://github.com/MicroJoe/rmatrix written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/MicroJoe/rmatrix already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40cd6a24682231c8140709487fb001ca8844594ac8d8b75d5fe7e5883d65f0c9
[INFO] running `Command { std: "docker" "start" "-a" "40cd6a24682231c8140709487fb001ca8844594ac8d8b75d5fe7e5883d65f0c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40cd6a24682231c8140709487fb001ca8844594ac8d8b75d5fe7e5883d65f0c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40cd6a24682231c8140709487fb001ca8844594ac8d8b75d5fe7e5883d65f0c9", kill_on_drop: false }`
[INFO] [stdout] 40cd6a24682231c8140709487fb001ca8844594ac8d8b75d5fe7e5883d65f0c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+fc81ad22c453776de16acf9938976930cf8c9401" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b8a20968417a627e6dc825ff195bff59df9a8789a7061fd82f658b6aebfdef33
[INFO] running `Command { std: "docker" "start" "-a" "b8a20968417a627e6dc825ff195bff59df9a8789a7061fd82f658b6aebfdef33", kill_on_drop: false }`
[INFO] [stderr]     Checking rmatrix v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `id`
[INFO] [stdout]   --> src/matrix.rs:63:8
[INFO] [stdout]    |
[INFO] [stdout] 63 | pub fn id(w: usize) -> Matrix {
[INFO] [stdout]    |        ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/matrix.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         format!("sq_from: vector length ({}) != matrix allocated size ({})",
[INFO] [stdout] 25 | |                 vec.len(), w*w)
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 24 |         "sq_from: vector length ({}) != matrix allocated size ({})",
[INFO] [stdout] 25 |                 vec.len(), w*w
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]   --> src/matrix.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 | /         format!("sq_from: vector length ({}) != matrix allocated size ({})",
[INFO] [stdout] 25 | |                 vec.len(), w*w)
[INFO] [stdout]    | |_______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_fmt_panic)]` on by default
[INFO] [stdout]    = note: this is no longer accepted in Rust 2021
[INFO] [stdout]    = note: the assert!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]    |
[INFO] [stdout] 24 |         "sq_from: vector length ({}) != matrix allocated size ({})",
[INFO] [stdout] 25 |                 vec.len(), w*w
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `Command { std: "docker" "inspect" "b8a20968417a627e6dc825ff195bff59df9a8789a7061fd82f658b6aebfdef33", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a20968417a627e6dc825ff195bff59df9a8789a7061fd82f658b6aebfdef33", kill_on_drop: false }`
[INFO] [stdout] b8a20968417a627e6dc825ff195bff59df9a8789a7061fd82f658b6aebfdef33