[INFO] cloning repository https://github.com/LegendarySaiyan/structures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LegendarySaiyan/structures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegendarySaiyan%2Fstructures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegendarySaiyan%2Fstructures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f375d1f242c501951f7a3a6c49a09a7895f57326
[INFO] testing LegendarySaiyan/structures against 1.83.0 for beta-1.84.0-4
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegendarySaiyan%2Fstructures" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LegendarySaiyan/structures on toolchain 1.83.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LegendarySaiyan/structures
[INFO] finished tweaking git repo https://github.com/LegendarySaiyan/structures
[INFO] tweaked toml for git repo https://github.com/LegendarySaiyan/structures written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/LegendarySaiyan/structures already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.83.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba84a1adcb93b09eb33eeb7374489dd9691f53e20eced81b51ca9bf174bc9e10
[INFO] running `Command { std: "docker" "start" "-a" "ba84a1adcb93b09eb33eeb7374489dd9691f53e20eced81b51ca9bf174bc9e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba84a1adcb93b09eb33eeb7374489dd9691f53e20eced81b51ca9bf174bc9e10", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba84a1adcb93b09eb33eeb7374489dd9691f53e20eced81b51ca9bf174bc9e10", kill_on_drop: false }`
[INFO] [stdout] ba84a1adcb93b09eb33eeb7374489dd9691f53e20eced81b51ca9bf174bc9e10
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 77dfd5304e5c569754e4ca36bbbb9879c245646dab03a77fccd4e001fd78c5d0
[INFO] running `Command { std: "docker" "start" "-a" "77dfd5304e5c569754e4ca36bbbb9879c245646dab03a77fccd4e001fd78c5d0", kill_on_drop: false }`
[INFO] [stderr]    Compiling structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `left` is never read
[INFO] [stdout]    --> src/binary_tree.rs:272:17
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:17
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:17
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:17
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/red_black_tree.rs:396:13
[INFO] [stdout]     |
[INFO] [stdout] 396 |         let mut x_ptr = x.unwrap().as_ptr();
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "77dfd5304e5c569754e4ca36bbbb9879c245646dab03a77fccd4e001fd78c5d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77dfd5304e5c569754e4ca36bbbb9879c245646dab03a77fccd4e001fd78c5d0", kill_on_drop: false }`
[INFO] [stdout] 77dfd5304e5c569754e4ca36bbbb9879c245646dab03a77fccd4e001fd78c5d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd508fe4b31e60c33bd0a2951766446b7d4dea6484b6c68178ddcfbbb948be2c
[INFO] running `Command { std: "docker" "start" "-a" "fd508fe4b31e60c33bd0a2951766446b7d4dea6484b6c68178ddcfbbb948be2c", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `left` is never read
[INFO] [stdout]    --> src/binary_tree.rs:272:17
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:17
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling structures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:17
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:17
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/red_black_tree.rs:396:13
[INFO] [stdout]     |
[INFO] [stdout] 396 |         let mut x_ptr = x.unwrap().as_ptr();
[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: value assigned to `left` is never read
[INFO] [stdout]    --> src/binary_tree.rs:272:17
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:17
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:17
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                 ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:17
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                 ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/red_black_tree.rs:396:13
[INFO] [stdout]     |
[INFO] [stdout] 396 |         let mut x_ptr = x.unwrap().as_ptr();
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "fd508fe4b31e60c33bd0a2951766446b7d4dea6484b6c68178ddcfbbb948be2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd508fe4b31e60c33bd0a2951766446b7d4dea6484b6c68178ddcfbbb948be2c", kill_on_drop: false }`
[INFO] [stdout] fd508fe4b31e60c33bd0a2951766446b7d4dea6484b6c68178ddcfbbb948be2c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+1.83.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3a41e09a421fe1c6436357e5f73d963e8a7eeff947f0b88133c5c169414d5c06
[INFO] running `Command { std: "docker" "start" "-a" "3a41e09a421fe1c6436357e5f73d963e8a7eeff947f0b88133c5c169414d5c06", kill_on_drop: false }`
[INFO] [stderr] warning: value assigned to `left` is never read
[INFO] [stderr]    --> src/binary_tree.rs:272:17
[INFO] [stderr]     |
[INFO] [stderr] 272 |         let mut left = std::option::Option::None;
[INFO] [stderr]     |                 ^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `right` is never read
[INFO] [stderr]    --> src/binary_tree.rs:273:17
[INFO] [stderr]     |
[INFO] [stderr] 273 |         let mut right = std::option::Option::None;
[INFO] [stderr]     |                 ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `parent` is never read
[INFO] [stderr]    --> src/binary_tree.rs:274:17
[INFO] [stderr]     |
[INFO] [stderr] 274 |         let mut parent = std::option::Option::None;
[INFO] [stderr]     |                 ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]    --> src/red_black_tree.rs:343:17
[INFO] [stderr]     |
[INFO] [stderr] 343 |         let mut x = None;
[INFO] [stderr]     |                 ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/red_black_tree.rs:396:13
[INFO] [stderr]     |
[INFO] [stderr] 396 |         let mut x_ptr = x.unwrap().as_ptr();
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stderr] warning: `structures` (lib) generated 5 warnings (run `cargo fix --lib -p structures` to apply 1 suggestion)
[INFO] [stdout] running 2 tests
[INFO] [stderr] warning: `structures` (lib test) generated 5 warnings (5 duplicates)
[INFO] [stdout] test binary_tree::tests::test_binary_tree ... ok
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] test red_black_tree::tests::test_red_black_tree ... ok
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/structures-a70c863d571ec18b)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests structures
[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" "3a41e09a421fe1c6436357e5f73d963e8a7eeff947f0b88133c5c169414d5c06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a41e09a421fe1c6436357e5f73d963e8a7eeff947f0b88133c5c169414d5c06", kill_on_drop: false }`
[INFO] [stdout] 3a41e09a421fe1c6436357e5f73d963e8a7eeff947f0b88133c5c169414d5c06