[INFO] cloning repository https://github.com/whostolemyhat/mazes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/whostolemyhat/mazes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhostolemyhat%2Fmazes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhostolemyhat%2Fmazes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7efcaf86c6f6569ab70a818382224514c8e4e030
[INFO] testing whostolemyhat/mazes against 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwhostolemyhat%2Fmazes" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/whostolemyhat/mazes on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/whostolemyhat/mazes
[INFO] finished tweaking git repo https://github.com/whostolemyhat/mazes
[INFO] tweaked toml for git repo https://github.com/whostolemyhat/mazes written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/whostolemyhat/mazes already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6294cd09556b13d26a1af0c333e84cf05d5fe6358d5e48c7465c3cb8299f276
[INFO] running `Command { std: "docker" "start" "-a" "c6294cd09556b13d26a1af0c333e84cf05d5fe6358d5e48c7465c3cb8299f276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6294cd09556b13d26a1af0c333e84cf05d5fe6358d5e48c7465c3cb8299f276", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6294cd09556b13d26a1af0c333e84cf05d5fe6358d5e48c7465c3cb8299f276", kill_on_drop: false }`
[INFO] [stdout] c6294cd09556b13d26a1af0c333e84cf05d5fe6358d5e48c7465c3cb8299f276
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d9b646a680d754d552a4a632bfc572a1036d35a5cf8cb1e069671948bb58b134
[INFO] running `Command { std: "docker" "start" "-a" "d9b646a680d754d552a4a632bfc572a1036d35a5cf8cb1e069671948bb58b134", 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]    Compiling syn v1.0.82
[INFO] [stderr]    Compiling serde v1.0.131
[INFO] [stderr]    Compiling anyhow v1.0.51
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling version-compare v0.0.11
[INFO] [stderr]    Compiling strum v0.21.0
[INFO] [stderr]    Compiling libc v0.2.111
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling futures-channel v0.3.17
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling cfg-expr v0.8.1
[INFO] [stderr]    Compiling futures-util v0.3.17
[INFO] [stderr]    Compiling deflate v0.9.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling png v0.17.2
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling futures-executor v0.3.17
[INFO] [stderr]    Compiling toml v0.5.8
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.30
[INFO] [stderr]    Compiling strum_macros v0.21.1
[INFO] [stderr]    Compiling thiserror v1.0.30
[INFO] [stderr]    Compiling proc-macro-crate v1.1.0
[INFO] [stderr]    Compiling system-deps v3.2.0
[INFO] [stderr]    Compiling glib-macros v0.14.1
[INFO] [stderr]    Compiling glib-sys v0.14.0
[INFO] [stderr]    Compiling gobject-sys v0.14.0
[INFO] [stderr]    Compiling cairo-sys-rs v0.14.9
[INFO] [stderr]    Compiling glib v0.14.8
[INFO] [stderr]    Compiling cairo-rs v0.14.9
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `unlink`
[INFO] [stdout]   --> src/cell.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 |   fn unlink(&mut self, cell_pos: &Position) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]   --> src/grid.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |   pub fn random_cell(&self) -> Option<&Cell> {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/grid.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 |   fn size(&self) -> i32 {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.46s
[INFO] running `Command { std: "docker" "inspect" "d9b646a680d754d552a4a632bfc572a1036d35a5cf8cb1e069671948bb58b134", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9b646a680d754d552a4a632bfc572a1036d35a5cf8cb1e069671948bb58b134", kill_on_drop: false }`
[INFO] [stdout] d9b646a680d754d552a4a632bfc572a1036d35a5cf8cb1e069671948bb58b134
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 51af0660e11e638cafb9557cb2f6af401c3a0fae990be216da172f35c687520d
[INFO] running `Command { std: "docker" "start" "-a" "51af0660e11e638cafb9557cb2f6af401c3a0fae990be216da172f35c687520d", kill_on_drop: false }`
[INFO] [stderr]    Compiling mazes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `unlink`
[INFO] [stdout]   --> src/cell.rs:40:6
[INFO] [stdout]    |
[INFO] [stdout] 40 |   fn unlink(&mut self, cell_pos: &Position) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `random_cell`
[INFO] [stdout]   --> src/grid.rs:57:10
[INFO] [stdout]    |
[INFO] [stdout] 57 |   pub fn random_cell(&self) -> Option<&Cell> {
[INFO] [stdout]    |          ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `size`
[INFO] [stdout]   --> src/grid.rs:62:6
[INFO] [stdout]    |
[INFO] [stdout] 62 |   fn size(&self) -> i32 {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "51af0660e11e638cafb9557cb2f6af401c3a0fae990be216da172f35c687520d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51af0660e11e638cafb9557cb2f6af401c3a0fae990be216da172f35c687520d", kill_on_drop: false }`
[INFO] [stdout] 51af0660e11e638cafb9557cb2f6af401c3a0fae990be216da172f35c687520d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8bdfa280dce59511d774c820b43856f42234c8abfd756adee79910c278f4bf52
[INFO] running `Command { std: "docker" "start" "-a" "8bdfa280dce59511d774c820b43856f42234c8abfd756adee79910c278f4bf52", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `unlink`
[INFO] [stderr]   --> src/cell.rs:40:6
[INFO] [stderr]    |
[INFO] [stderr] 40 |   fn unlink(&mut self, cell_pos: &Position) {
[INFO] [stderr]    |      ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `random_cell`
[INFO] [stderr]   --> src/grid.rs:57:10
[INFO] [stderr]    |
[INFO] [stderr] 57 |   pub fn random_cell(&self) -> Option<&Cell> {
[INFO] [stderr]    |          ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `size`
[INFO] [stderr]   --> src/grid.rs:62:6
[INFO] [stderr]    |
[INFO] [stderr] 62 |   fn size(&self) -> i32 {
[INFO] [stderr]    |      ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mazes` (bin "mazes" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mazes-969862a0cf2c1d4a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8bdfa280dce59511d774c820b43856f42234c8abfd756adee79910c278f4bf52", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bdfa280dce59511d774c820b43856f42234c8abfd756adee79910c278f4bf52", kill_on_drop: false }`
[INFO] [stdout] 8bdfa280dce59511d774c820b43856f42234c8abfd756adee79910c278f4bf52