[INFO] cloning repository https://github.com/mlhoutel/amazing_maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mlhoutel/amazing_maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlhoutel%2Famazing_maze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlhoutel%2Famazing_maze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 74e96de8710b0290d998ec8f77f31db7d4f252e1
[INFO] checking mlhoutel/amazing_maze against master#350d0ef0ec0493e6d21cfb265cb8211a0e74d766 for pr-145342-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmlhoutel%2Famazing_maze" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/mlhoutel/amazing_maze
[INFO] finished tweaking git repo https://github.com/mlhoutel/amazing_maze
[INFO] tweaked toml for git repo https://github.com/mlhoutel/amazing_maze written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/mlhoutel/amazing_maze on toolchain 350d0ef0ec0493e6d21cfb265cb8211a0e74d766
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/mlhoutel/amazing_maze 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" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded proc-macro2 v1.0.38
[INFO] [stderr]   Downloaded syn v1.0.93
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e04d6a716a22f489eac078b7a85a2aaca4e0ba32023efa8bcbdff5cb58379095
[INFO] running `Command { std: "docker" "start" "-a" "e04d6a716a22f489eac078b7a85a2aaca4e0ba32023efa8bcbdff5cb58379095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e04d6a716a22f489eac078b7a85a2aaca4e0ba32023efa8bcbdff5cb58379095", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e04d6a716a22f489eac078b7a85a2aaca4e0ba32023efa8bcbdff5cb58379095", kill_on_drop: false }`
[INFO] [stdout] e04d6a716a22f489eac078b7a85a2aaca4e0ba32023efa8bcbdff5cb58379095
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+350d0ef0ec0493e6d21cfb265cb8211a0e74d766" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7c9db11fea8da0db0376d89fde1247f9b5dfab9192610e8c84330ce4048a7ff
[INFO] running `Command { std: "docker" "start" "-a" "e7c9db11fea8da0db0376d89fde1247f9b5dfab9192610e8c84330ce4048a7ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.38
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.93
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling darling_core v0.14.1
[INFO] [stderr]    Compiling darling_macro v0.14.1
[INFO] [stderr]    Compiling darling v0.14.1
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking amazing_maze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: methods `explore` and `explore_trace` are never used
[INFO] [stdout]   --> src/maze/maze.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Maze {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 22 |     pub fn explore(self: &Maze) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn explore_trace(self: &Maze, trace: &mut Vec<String>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `explore` and `explore_trace` are never used
[INFO] [stdout]   --> src/maze/maze.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl Maze {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 22 |     pub fn explore(self: &Maze) -> Vec<String> {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     fn explore_trace(self: &Maze, trace: &mut Vec<String>) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.50s
[INFO] running `Command { std: "docker" "inspect" "e7c9db11fea8da0db0376d89fde1247f9b5dfab9192610e8c84330ce4048a7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7c9db11fea8da0db0376d89fde1247f9b5dfab9192610e8c84330ce4048a7ff", kill_on_drop: false }`
[INFO] [stdout] e7c9db11fea8da0db0376d89fde1247f9b5dfab9192610e8c84330ce4048a7ff