[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] building LegendarySaiyan/structures against master#f9988fefd3add01f414f52b414308e7872622fee for pr-155114
[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] 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] validating manifest of git repo https://github.com/LegendarySaiyan/structures on toolchain f9988fefd3add01f414f52b414308e7872622fee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+f9988fefd3add01f414f52b414308e7872622fee" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f15bc809b67c28d9d42d7aca016776f683b832266e7f4eb6a34ce3eb3025f7b
[INFO] running `Command { std: "docker" "start" "-a" "5f15bc809b67c28d9d42d7aca016776f683b832266e7f4eb6a34ce3eb3025f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f15bc809b67c28d9d42d7aca016776f683b832266e7f4eb6a34ce3eb3025f7b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f15bc809b67c28d9d42d7aca016776f683b832266e7f4eb6a34ce3eb3025f7b", kill_on_drop: false }`
[INFO] [stdout] 5f15bc809b67c28d9d42d7aca016776f683b832266e7f4eb6a34ce3eb3025f7b
[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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 845894c6aa402d7a67c1343fb362a3a34e3520074ef37b9c3bcb6e266bbfa6de
[INFO] running `Command { std: "docker" "start" "-a" "845894c6aa402d7a67c1343fb362a3a34e3520074ef37b9c3bcb6e266bbfa6de", 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:272:24
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 279 |             left = None;
[INFO] [stdout]     |             ----------- `left` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:25
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 285 |             right = None;
[INFO] [stdout]     |             ------------ `right` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:26
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 291 |             parent = None;
[INFO] [stdout]     |             ------------- `parent` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:21
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                     ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 370 |                 x = y_right;
[INFO] [stdout]     |                 ----------- `x` is overwritten here before the previous value is 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "845894c6aa402d7a67c1343fb362a3a34e3520074ef37b9c3bcb6e266bbfa6de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "845894c6aa402d7a67c1343fb362a3a34e3520074ef37b9c3bcb6e266bbfa6de", kill_on_drop: false }`
[INFO] [stdout] 845894c6aa402d7a67c1343fb362a3a34e3520074ef37b9c3bcb6e266bbfa6de
[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=forbid" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+f9988fefd3add01f414f52b414308e7872622fee" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 54f7ab220a28591601fa09afa211ecbc557b4055ce0f0fd35240a503b7293f77
[INFO] running `Command { std: "docker" "start" "-a" "54f7ab220a28591601fa09afa211ecbc557b4055ce0f0fd35240a503b7293f77", kill_on_drop: false }`
[INFO] [stdout] warning: value assigned to `left` is never read
[INFO] [stdout]    --> src/binary_tree.rs:272:24
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 279 |             left = None;
[INFO] [stdout]     |             ----------- `left` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:25
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 285 |             right = None;
[INFO] [stdout]     |             ------------ `right` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:26
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 291 |             parent = None;
[INFO] [stdout]     |             ------------- `parent` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:21
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                     ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 370 |                 x = y_right;
[INFO] [stdout]     |                 ----------- `x` is overwritten here before the previous value is 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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:272:24
[INFO] [stdout]     |
[INFO] [stdout] 272 |         let mut left = std::option::Option::None;
[INFO] [stdout]     |                        ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 279 |             left = None;
[INFO] [stdout]     |             ----------- `left` is overwritten here before the previous value is read
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `right` is never read
[INFO] [stdout]    --> src/binary_tree.rs:273:25
[INFO] [stdout]     |
[INFO] [stdout] 273 |         let mut right = std::option::Option::None;
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 285 |             right = None;
[INFO] [stdout]     |             ------------ `right` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `parent` is never read
[INFO] [stdout]    --> src/binary_tree.rs:274:26
[INFO] [stdout]     |
[INFO] [stdout] 274 |         let mut parent = std::option::Option::None;
[INFO] [stdout]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 291 |             parent = None;
[INFO] [stdout]     |             ------------- `parent` is overwritten here before the previous value is read
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/red_black_tree.rs:343:21
[INFO] [stdout]     |
[INFO] [stdout] 343 |         let mut x = None;
[INFO] [stdout]     |                     ^^^^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 370 |                 x = y_right;
[INFO] [stdout]     |                 ----------- `x` is overwritten here before the previous value is 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "54f7ab220a28591601fa09afa211ecbc557b4055ce0f0fd35240a503b7293f77", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54f7ab220a28591601fa09afa211ecbc557b4055ce0f0fd35240a503b7293f77", kill_on_drop: false }`
[INFO] [stdout] 54f7ab220a28591601fa09afa211ecbc557b4055ce0f0fd35240a503b7293f77
