[INFO] cloning repository https://github.com/cleak/mazes-for-programmers-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cleak/mazes-for-programmers-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcleak%2Fmazes-for-programmers-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcleak%2Fmazes-for-programmers-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1b545cb6cc2de3a25e0aa99d049de8115d94bf8c
[INFO] checking cleak/mazes-for-programmers-rs against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcleak%2Fmazes-for-programmers-rs" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cleak/mazes-for-programmers-rs on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cleak/mazes-for-programmers-rs
[INFO] finished tweaking git repo https://github.com/cleak/mazes-for-programmers-rs
[INFO] tweaked toml for git repo https://github.com/cleak/mazes-for-programmers-rs written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/cleak/mazes-for-programmers-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ppv-lite86 v0.2.15
[INFO] [stderr]   Downloaded rand_hc v0.3.1
[INFO] [stderr]   Downloaded simba v0.6.0
[INFO] [stderr]   Downloaded typenum v1.14.0
[INFO] [stderr]   Downloaded ndarray v0.15.3
[INFO] [stderr]   Downloaded paste v1.0.5
[INFO] [stderr]   Downloaded proc-macro2 v1.0.30
[INFO] [stderr]   Downloaded approx v0.5.0
[INFO] [stderr]   Downloaded matrixmultiply v0.3.1
[INFO] [stderr]   Downloaded wide v0.7.1
[INFO] [stderr]   Downloaded safe_arch v0.6.0
[INFO] [stderr]   Downloaded nalgebra v0.29.0
[INFO] [stderr]   Downloaded libc v0.2.105
[INFO] [stderr]   Downloaded rand v0.8.4
[INFO] [stderr]   Downloaded rand_core v0.6.3
[INFO] [stderr]   Downloaded rand_chacha v0.3.1
[INFO] [stderr]   Downloaded nalgebra-macros v0.1.0
[INFO] [stderr]   Downloaded bytemuck v1.7.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 84a2f358ded34c142d01eeac9d5c4d0f42358e10c86a406db57cfee4a57c64ca
[INFO] running `Command { std: "docker" "start" "-a" "84a2f358ded34c142d01eeac9d5c4d0f42358e10c86a406db57cfee4a57c64ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "84a2f358ded34c142d01eeac9d5c4d0f42358e10c86a406db57cfee4a57c64ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "84a2f358ded34c142d01eeac9d5c4d0f42358e10c86a406db57cfee4a57c64ca", kill_on_drop: false }`
[INFO] [stdout] 84a2f358ded34c142d01eeac9d5c4d0f42358e10c86a406db57cfee4a57c64ca
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab3460c527fab0820b9a7463679c0447a10e58cf63269019a2aa8fd9b72261ca
[INFO] running `Command { std: "docker" "start" "-a" "ab3460c527fab0820b9a7463679c0447a10e58cf63269019a2aa8fd9b72261ca", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.105
[INFO] [stderr]    Compiling proc-macro2 v1.0.30
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.80
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling typenum v1.14.0
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]    Compiling paste v1.0.5
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]     Checking safe_arch v0.6.0
[INFO] [stderr]     Checking matrixmultiply v0.3.1
[INFO] [stderr]     Checking wide v0.7.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking approx v0.5.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking simba v0.6.0
[INFO] [stderr]     Checking ndarray v0.15.3
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]    Compiling nalgebra-macros v0.1.0
[INFO] [stderr]     Checking nalgebra v0.29.0
[INFO] [stderr]     Checking mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `gen_btree`
[INFO] [stdout]   --> src/main.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn gen_btree(shape: (usize, usize)) -> Array2<Cell> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gen_btree`
[INFO] [stdout]   --> src/main.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn gen_btree(shape: (usize, usize)) -> Array2<Cell> {
[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] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 49.59s
[INFO] running `Command { std: "docker" "inspect" "ab3460c527fab0820b9a7463679c0447a10e58cf63269019a2aa8fd9b72261ca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab3460c527fab0820b9a7463679c0447a10e58cf63269019a2aa8fd9b72261ca", kill_on_drop: false }`
[INFO] [stdout] ab3460c527fab0820b9a7463679c0447a10e58cf63269019a2aa8fd9b72261ca