[INFO] cloning repository https://github.com/cronik/rusty-maze
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cronik/rusty-maze" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronik%2Frusty-maze", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronik%2Frusty-maze'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2dd86c39fb3cf017db8e8143fcb0cf3a051ab067
[INFO] testing cronik/rusty-maze against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronik%2Frusty-maze" "/workspace/builds/worker-104/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-104/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cronik/rusty-maze on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cronik/rusty-maze
[INFO] finished tweaking git repo https://github.com/cronik/rusty-maze
[INFO] tweaked toml for git repo https://github.com/cronik/rusty-maze written to /workspace/builds/worker-104/source/Cargo.toml
[INFO] crate git repo https://github.com/cronik/rusty-maze already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ed8d059de9e67b15d0769139efa6dc5d2c683489cd6c44ec57ae1b22b1319611
[INFO] running `Command { std: "docker" "start" "-a" "ed8d059de9e67b15d0769139efa6dc5d2c683489cd6c44ec57ae1b22b1319611", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ed8d059de9e67b15d0769139efa6dc5d2c683489cd6c44ec57ae1b22b1319611", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ed8d059de9e67b15d0769139efa6dc5d2c683489cd6c44ec57ae1b22b1319611", kill_on_drop: false }`
[INFO] [stdout] ed8d059de9e67b15d0769139efa6dc5d2c683489cd6c44ec57ae1b22b1319611
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39e8a64822dba60bbea0305be3d9528e31e9a407a800a2a24383a6df05136726
[INFO] running `Command { std: "docker" "start" "-a" "39e8a64822dba60bbea0305be3d9528e31e9a407a800a2a24383a6df05136726", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.86
[INFO] [stderr]    Compiling syn v1.0.60
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling numtoa v0.1.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling termion v1.5.6
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling ron v0.6.4
[INFO] [stderr]    Compiling rusty_maze v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `lookup`
[INFO] [stdout]   --> src/disjset.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn lookup(&self, c:usize) -> usize {
[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: `len`
[INFO] [stdout]   --> src/disjset.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 53.73s
[INFO] running `Command { std: "docker" "inspect" "39e8a64822dba60bbea0305be3d9528e31e9a407a800a2a24383a6df05136726", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39e8a64822dba60bbea0305be3d9528e31e9a407a800a2a24383a6df05136726", kill_on_drop: false }`
[INFO] [stdout] 39e8a64822dba60bbea0305be3d9528e31e9a407a800a2a24383a6df05136726
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c8f5e7891e9b0729feb5464c147e96e3596521274cbe1bc49beadb399e11a607
[INFO] running `Command { std: "docker" "start" "-a" "c8f5e7891e9b0729feb5464c147e96e3596521274cbe1bc49beadb399e11a607", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rusty_maze v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `lookup`
[INFO] [stdout]   --> src/disjset.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 |     pub fn lookup(&self, c:usize) -> usize {
[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: `len`
[INFO] [stdout]   --> src/disjset.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn len(&self) -> usize {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `len`
[INFO] [stdout]   --> src/disjset.rs:62:12
[INFO] [stdout]    |
[INFO] [stdout] 62 |     pub fn len(&self) -> usize {
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.63s
[INFO] running `Command { std: "docker" "inspect" "c8f5e7891e9b0729feb5464c147e96e3596521274cbe1bc49beadb399e11a607", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8f5e7891e9b0729feb5464c147e96e3596521274cbe1bc49beadb399e11a607", kill_on_drop: false }`
[INFO] [stdout] c8f5e7891e9b0729feb5464c147e96e3596521274cbe1bc49beadb399e11a607
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3e932220ac8c3b4c3b5e5aaf2ba1aa2e5d78e581e030553284cf88143f1033a5
[INFO] running `Command { std: "docker" "start" "-a" "3e932220ac8c3b4c3b5e5aaf2ba1aa2e5d78e581e030553284cf88143f1033a5", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `lookup`
[INFO] [stderr]   --> src/disjset.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 |     pub fn lookup(&self, c:usize) -> usize {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/disjset.rs:62:12
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `len`
[INFO] [stderr]   --> src/disjset.rs:62:12
[INFO] [stderr]    |
[INFO] [stderr] 62 |     pub fn len(&self) -> usize {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rusty_maze` (lib) generated 2 warnings
[INFO] [stderr] warning: `rusty_maze` (lib test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.14s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusty_maze-f7691c946a773847)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test disjset::tests::test_union ... ok
[INFO] [stdout] test maze::tests::test_save ... ok
[INFO] [stdout] test maze::tests::test_ui_draw ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rusty_maze-9158c96f1922059d)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rusty_maze
[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] [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" "3e932220ac8c3b4c3b5e5aaf2ba1aa2e5d78e581e030553284cf88143f1033a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e932220ac8c3b4c3b5e5aaf2ba1aa2e5d78e581e030553284cf88143f1033a5", kill_on_drop: false }`
[INFO] [stdout] 3e932220ac8c3b4c3b5e5aaf2ba1aa2e5d78e581e030553284cf88143f1033a5