[INFO] cloning repository https://github.com/VoxWave/a-b-list-sorter [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/VoxWave/a-b-list-sorter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoxWave%2Fa-b-list-sorter", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoxWave%2Fa-b-list-sorter'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 08a0357a4ee6937f48fd2674f7d1aaac778a56c6 [INFO] testing VoxWave/a-b-list-sorter against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FVoxWave%2Fa-b-list-sorter" "/workspace/builds/worker-4/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/VoxWave/a-b-list-sorter on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/VoxWave/a-b-list-sorter [INFO] finished tweaking git repo https://github.com/VoxWave/a-b-list-sorter [INFO] tweaked toml for git repo https://github.com/VoxWave/a-b-list-sorter written to /workspace/builds/worker-4/source/Cargo.toml [INFO] crate git repo https://github.com/VoxWave/a-b-list-sorter already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] f83a62525deaa3e1581bd53b214aab54814fc4b92ec517d899bbf083fb1b1bbb [INFO] running `Command { std: "docker" "start" "-a" "f83a62525deaa3e1581bd53b214aab54814fc4b92ec517d899bbf083fb1b1bbb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f83a62525deaa3e1581bd53b214aab54814fc4b92ec517d899bbf083fb1b1bbb", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f83a62525deaa3e1581bd53b214aab54814fc4b92ec517d899bbf083fb1b1bbb", kill_on_drop: false }` [INFO] [stdout] f83a62525deaa3e1581bd53b214aab54814fc4b92ec517d899bbf083fb1b1bbb [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 2946110d97f66d51da761725b908a2f8d3ae46381d01ebf38efab61ac8358d11 [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" "2946110d97f66d51da761725b908a2f8d3ae46381d01ebf38efab61ac8358d11", kill_on_drop: false }` [INFO] [stderr] Compiling list_sorter v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.29s [INFO] running `Command { std: "docker" "inspect" "2946110d97f66d51da761725b908a2f8d3ae46381d01ebf38efab61ac8358d11", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2946110d97f66d51da761725b908a2f8d3ae46381d01ebf38efab61ac8358d11", kill_on_drop: false }` [INFO] [stdout] 2946110d97f66d51da761725b908a2f8d3ae46381d01ebf38efab61ac8358d11 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] d04fdf73feeadca255b7795ac4b9819cec412ea792c7d5705992d735973ff41b [INFO] running `Command { std: "docker" "start" "-a" "d04fdf73feeadca255b7795ac4b9819cec412ea792c7d5705992d735973ff41b", kill_on_drop: false }` [INFO] [stderr] Compiling getrandom v0.1.14 [INFO] [stderr] Compiling rand_core v0.5.1 [INFO] [stderr] Compiling rand_chacha v0.2.2 [INFO] [stderr] Compiling rand v0.7.3 [INFO] [stderr] Compiling list_sorter v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:262:9 [INFO] [stdout] | [INFO] [stdout] 262 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 262 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:296:9 [INFO] [stdout] | [INFO] [stdout] 296 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 296 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:323:9 [INFO] [stdout] | [INFO] [stdout] 323 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 323 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:335:9 [INFO] [stdout] | [INFO] [stdout] 335 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 335 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:358:9 [INFO] [stdout] | [INFO] [stdout] 358 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 358 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:391:9 [INFO] [stdout] | [INFO] [stdout] 391 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 391 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused borrow that must be used [INFO] [stdout] --> src/main.rs:424:9 [INFO] [stdout] | [INFO] [stdout] 424 | &mut sorted.shuffle(&mut rng); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stdout] | [INFO] [stdout] help: use `let _ = ...` to ignore the resulting value [INFO] [stdout] | [INFO] [stdout] 424 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 7 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 6.80s [INFO] running `Command { std: "docker" "inspect" "d04fdf73feeadca255b7795ac4b9819cec412ea792c7d5705992d735973ff41b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d04fdf73feeadca255b7795ac4b9819cec412ea792c7d5705992d735973ff41b", kill_on_drop: false }` [INFO] [stdout] d04fdf73feeadca255b7795ac4b9819cec412ea792c7d5705992d735973ff41b [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 3f6144da771fb95c0c0d799c53671a2e0a5c6de855abf5187ff8c11686f2d558 [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" "3f6144da771fb95c0c0d799c53671a2e0a5c6de855abf5187ff8c11686f2d558", kill_on_drop: false }` [INFO] [stdout] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stdout] running 11 tests [INFO] [stderr] --> src/main.rs:262:9 [INFO] [stderr] | [INFO] [stderr] 262 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_must_use)]` on by default [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 262 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:296:9 [INFO] [stderr] | [INFO] [stderr] 296 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 296 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:323:9 [INFO] [stderr] | [INFO] [stderr] 323 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 323 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:335:9 [INFO] [stderr] | [INFO] [stderr] 335 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 335 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:358:9 [INFO] [stderr] | [INFO] [stderr] 358 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 358 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:391:9 [INFO] [stderr] | [INFO] [stderr] 391 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 391 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: unused borrow that must be used [INFO] [stderr] --> src/main.rs:424:9 [INFO] [stderr] | [INFO] [stderr] 424 | &mut sorted.shuffle(&mut rng); [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value [INFO] [stderr] | [INFO] [stderr] help: use `let _ = ...` to ignore the resulting value [INFO] [stderr] | [INFO] [stderr] 424 | let _ = &mut sorted.shuffle(&mut rng); [INFO] [stderr] | +++++++ [INFO] [stderr] [INFO] [stderr] warning: `list_sorter` (bin "list_sorter" test) generated 7 warnings [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.08s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/list_sorter-d2af88537e05becc) [INFO] [stdout] test sort_test_2 ... ok [INFO] [stdout] test merge_sort_test_1 ... ok [INFO] [stdout] test merge_sort_test_2 ... ok [INFO] [stdout] test runs_should_be_the_same ... ok [INFO] [stdout] test sort_test_1 ... ok [INFO] [stdout] test merge_sort_test_3 ... ok [INFO] [stdout] test sort_test_3 ... ok [INFO] [stdout] test merge_is_better_than_std_unstable ... ok [INFO] [stdout] test merge_is_better_than_std ... ok [INFO] [stdout] test merge_is_better_2 ... ok [INFO] [stdout] test merge_is_better ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 17.31s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "3f6144da771fb95c0c0d799c53671a2e0a5c6de855abf5187ff8c11686f2d558", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3f6144da771fb95c0c0d799c53671a2e0a5c6de855abf5187ff8c11686f2d558", kill_on_drop: false }` [INFO] [stdout] 3f6144da771fb95c0c0d799c53671a2e0a5c6de855abf5187ff8c11686f2d558