[INFO] updating cached repository https://github.com/TheRiven/mazegenerator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9e021d139b3ec222eae371c8cfb95033e6e5a168
[INFO] testing TheRiven/mazegenerator against master#8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e for pr-74409
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTheRiven%2Fmazegenerator" "/workspace/builds/worker-8/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/TheRiven/mazegenerator on toolchain 8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/TheRiven/mazegenerator
[INFO] finished tweaking git repo https://github.com/TheRiven/mazegenerator
[INFO] tweaked toml for git repo https://github.com/TheRiven/mazegenerator written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/TheRiven/mazegenerator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 070e5802e0c4291331077fb2a7d6cf418687f87368a49e366135add2e9ae925b
[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" "070e5802e0c4291331077fb2a7d6cf418687f87368a49e366135add2e9ae925b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "070e5802e0c4291331077fb2a7d6cf418687f87368a49e366135add2e9ae925b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "070e5802e0c4291331077fb2a7d6cf418687f87368a49e366135add2e9ae925b", kill_on_drop: false }`
[INFO] [stdout] 070e5802e0c4291331077fb2a7d6cf418687f87368a49e366135add2e9ae925b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7508804aa1f565fa5ff5ba98ce7ab7a9c442155152c596a696684c29af803c36
[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" "7508804aa1f565fa5ff5ba98ce7ab7a9c442155152c596a696684c29af803c36", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.2
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling libc v0.2.39
[INFO] [stderr]    Compiling rayon-core v1.4.0
[INFO] [stderr]    Compiling adler32 v1.0.2
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling either v1.4.0
[INFO] [stderr]    Compiling color_quant v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling inflate v0.3.4
[INFO] [stderr]    Compiling gif v0.9.2
[INFO] [stderr]    Compiling deflate v0.7.17
[INFO] [stderr]    Compiling crossbeam-epoch v0.3.0
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling png v0.11.0
[INFO] [stderr]    Compiling rayon v1.0.1
[INFO] [stderr]    Compiling jpeg-decoder v0.1.14
[INFO] [stderr]    Compiling image v0.18.0
[INFO] [stderr]    Compiling mazegenerator v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 36.06s
[INFO] running `Command { std: "docker" "inspect" "7508804aa1f565fa5ff5ba98ce7ab7a9c442155152c596a696684c29af803c36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7508804aa1f565fa5ff5ba98ce7ab7a9c442155152c596a696684c29af803c36", kill_on_drop: false }`
[INFO] [stdout] 7508804aa1f565fa5ff5ba98ce7ab7a9c442155152c596a696684c29af803c36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a8ced1406cd4173a248ea411137f7eb224f7f3d5fccf065d47566518dcddcf7
[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" "9a8ced1406cd4173a248ea411137f7eb224f7f3d5fccf065d47566518dcddcf7", kill_on_drop: false }`
[INFO] [stderr]    Compiling mazegenerator v0.8.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stdout]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 92 |     (chosen)
[INFO] [stdout]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stdout]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.81s
[INFO] running `Command { std: "docker" "inspect" "9a8ced1406cd4173a248ea411137f7eb224f7f3d5fccf065d47566518dcddcf7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a8ced1406cd4173a248ea411137f7eb224f7f3d5fccf065d47566518dcddcf7", kill_on_drop: false }`
[INFO] [stdout] 9a8ced1406cd4173a248ea411137f7eb224f7f3d5fccf065d47566518dcddcf7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+8534be72fc3b9c5f2f2dc4e4ee7b651a008e9a3e" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b5773f3e94c2ffeee784ba09e28648054f59847ac2a1b6ce205a9ee5d757cd5
[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" "7b5773f3e94c2ffeee784ba09e28648054f59847ac2a1b6ce205a9ee5d757cd5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     (chosen)
[INFO] [stderr]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:86:74
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> src/mazebuilder/dfs.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     (chosen)
[INFO] [stderr]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/mazebuilder/maze.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mazegenerator-6c0aef603b9cfdc4
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test mazebuilder::tests::test_kruskal_10_10 ... ok
[INFO] [stdout] test mazebuilder::tests::test_generate_maze_selector ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_15_23 ... ok
[INFO] [stdout] test mazebuilder::tests::test_kruskal_15_23 ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_10_10 ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_imperfect ... ok
[INFO] [stdout] test mazebuilder::tests::test_dfs_100_100 ... ok
[INFO] [stdout] test mazebuilder::tests::test_kruskal_100_100 ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mazegenerator-2bd2cd86eeef4a7f
[INFO] [stdout] test mazebuilder::tests::test_kruskal_imperfect ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mazegenerator
[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
[INFO] [stdout] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/dfs.rs:86:74
[INFO] [stderr]    |
[INFO] [stderr] 86 | fn pick_random_neighbour<'a>(neighbours: &Vec<(&'a Cell, Direction)>) -> ((&'a Cell, Direction)) {
[INFO] [stderr]    |                                                                          ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/dfs.rs:92:5
[INFO] [stderr]    |
[INFO] [stderr] 92 |     (chosen)
[INFO] [stderr]    |     ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> /opt/rustwide/workdir/src/mazebuilder/maze.rs:25:54
[INFO] [stderr]    |
[INFO] [stderr] 25 |     pub fn get_cell(&self, x: u32, y: u32) -> Option<(&Cell)> {
[INFO] [stderr]    |                                                      ^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[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
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7b5773f3e94c2ffeee784ba09e28648054f59847ac2a1b6ce205a9ee5d757cd5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b5773f3e94c2ffeee784ba09e28648054f59847ac2a1b6ce205a9ee5d757cd5", kill_on_drop: false }`
[INFO] [stdout] 7b5773f3e94c2ffeee784ba09e28648054f59847ac2a1b6ce205a9ee5d757cd5