[INFO] cloning repository https://github.com/02alexander/maze-solver [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/02alexander/maze-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fmaze-solver", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fmaze-solver'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 4303321d53fdbde07fa4a170dc2621ef0f8172fb [INFO] checking 02alexander/maze-solver against master#6526e5c772f2da07db745c94ca6bb0a591a39ba4 for pr-80920 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F02alexander%2Fmaze-solver" "/workspace/builds/worker-3/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/02alexander/maze-solver on toolchain 6526e5c772f2da07db745c94ca6bb0a591a39ba4 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/02alexander/maze-solver [INFO] finished tweaking git repo https://github.com/02alexander/maze-solver [INFO] tweaked toml for git repo https://github.com/02alexander/maze-solver written to /workspace/builds/worker-3/source/Cargo.toml [INFO] crate git repo https://github.com/02alexander/maze-solver already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] dc0b61b57f72eb4ca19df57a541751117ef940426f02eb8784a09e6c22ef8de7 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "dc0b61b57f72eb4ca19df57a541751117ef940426f02eb8784a09e6c22ef8de7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "dc0b61b57f72eb4ca19df57a541751117ef940426f02eb8784a09e6c22ef8de7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "dc0b61b57f72eb4ca19df57a541751117ef940426f02eb8784a09e6c22ef8de7", kill_on_drop: false }` [INFO] [stdout] dc0b61b57f72eb4ca19df57a541751117ef940426f02eb8784a09e6c22ef8de7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+6526e5c772f2da07db745c94ca6bb0a591a39ba4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] d3d4a4299566f358bacf06aaf7b381d23a869d4c9e5127b553dae07ed2fc2cca [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "d3d4a4299566f358bacf06aaf7b381d23a869d4c9e5127b553dae07ed2fc2cca", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Compiling cc v1.0.18 [INFO] [stderr] Checking libc v0.2.42 [INFO] [stderr] Compiling miniz-sys v0.1.10 [INFO] [stderr] Checking flate2 v0.2.20 [INFO] [stderr] Checking imagefmt v4.0.0 [INFO] [stderr] Checking maze-solver v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused imports: `read`, `write` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | use imagefmt::{read, write, ColFmt, ColType}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem::drop` [INFO] [stdout] --> src/tree.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::mem::drop; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Node` [INFO] [stdout] --> src/path_to_end.rs:3:35 [INFO] [stdout] | [INFO] [stdout] 3 | use super::tree::{QuaternaryTree, Node, Link}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `read`, `write` [INFO] [stdout] --> src/main.rs:3:16 [INFO] [stdout] | [INFO] [stdout] 3 | use imagefmt::{read, write, ColFmt, ColType}; [INFO] [stdout] | ^^^^ ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::mem::drop` [INFO] [stdout] --> src/tree.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::mem::drop; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/tree.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | let mut cur = &mut *next.take().unwrap(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/tree.rs:41:8 [INFO] [stdout] | [INFO] [stdout] 41 | let mut cur = &mut *next.take().unwrap(); [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:20:2 [INFO] [stdout] | [INFO] [stdout] 20 | imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `std::result::Result` that must be used [INFO] [stdout] --> src/main.rs:20:2 [INFO] [stdout] | [INFO] [stdout] 20 | imagefmt::write("out.bmp", maze.width, maze.height, ColFmt::RGB, &pixels, ColType::Auto); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 8.51s [INFO] running `Command { std: "docker" "inspect" "d3d4a4299566f358bacf06aaf7b381d23a869d4c9e5127b553dae07ed2fc2cca", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d3d4a4299566f358bacf06aaf7b381d23a869d4c9e5127b553dae07ed2fc2cca", kill_on_drop: false }` [INFO] [stdout] d3d4a4299566f358bacf06aaf7b381d23a869d4c9e5127b553dae07ed2fc2cca