[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 try#b8e88e5ddf5521a9f43ee3f62a702388c713e4bb for pr-155114
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLegendarySaiyan%2Fstructures" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/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-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/LegendarySaiyan/structures on toolchain b8e88e5ddf5521a9f43ee3f62a702388c713e4bb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "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" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96419d40fb1c981587e6519d8e6c502b70b1061421a5897ea3c3530ac82c9193
[INFO] running `Command { std: "docker" "start" "-a" "96419d40fb1c981587e6519d8e6c502b70b1061421a5897ea3c3530ac82c9193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96419d40fb1c981587e6519d8e6c502b70b1061421a5897ea3c3530ac82c9193", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96419d40fb1c981587e6519d8e6c502b70b1061421a5897ea3c3530ac82c9193", kill_on_drop: false }`
[INFO] [stdout] 96419d40fb1c981587e6519d8e6c502b70b1061421a5897ea3c3530ac82c9193
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e96e8a02fca24cce969803bc1b6a2263d19a2d7ba1ffa362638229ffc8e0268f
[INFO] running `Command { std: "docker" "start" "-a" "e96e8a02fca24cce969803bc1b6a2263d19a2d7ba1ffa362638229ffc8e0268f", 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 0.28s
[INFO] running `Command { std: "docker" "inspect" "e96e8a02fca24cce969803bc1b6a2263d19a2d7ba1ffa362638229ffc8e0268f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e96e8a02fca24cce969803bc1b6a2263d19a2d7ba1ffa362638229ffc8e0268f", kill_on_drop: false }`
[INFO] [stdout] e96e8a02fca24cce969803bc1b6a2263d19a2d7ba1ffa362638229ffc8e0268f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "+b8e88e5ddf5521a9f43ee3f62a702388c713e4bb" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 16af20f429273274cefc2a69cccc395042bb179f486ff4cc4f5636c873fd5bbd
[INFO] running `Command { std: "docker" "start" "-a" "16af20f429273274cefc2a69cccc395042bb179f486ff4cc4f5636c873fd5bbd", 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] [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:274:26
[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] [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 0.51s
[INFO] running `Command { std: "docker" "inspect" "16af20f429273274cefc2a69cccc395042bb179f486ff4cc4f5636c873fd5bbd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16af20f429273274cefc2a69cccc395042bb179f486ff4cc4f5636c873fd5bbd", kill_on_drop: false }`
[INFO] [stdout] 16af20f429273274cefc2a69cccc395042bb179f486ff4cc4f5636c873fd5bbd
