[INFO] cloning repository https://github.com/yousuf64/rustradix
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yousuf64/rustradix" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyousuf64%2Frustradix", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyousuf64%2Frustradix'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f15644656cb1380b8adb87fe75249e044bc8197c
[INFO] linting yousuf64/rustradix against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyousuf64%2Frustradix" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yousuf64/rustradix
[INFO] finished tweaking git repo https://github.com/yousuf64/rustradix
[INFO] tweaked toml for git repo https://github.com/yousuf64/rustradix written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yousuf64/rustradix on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yousuf64/rustradix 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4c24cb43da34d4a28eb05a222902b075209c0a23288002e966f61c8e3cbf4c53
[INFO] running `Command { std: "docker" "start" "-a" "4c24cb43da34d4a28eb05a222902b075209c0a23288002e966f61c8e3cbf4c53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4c24cb43da34d4a28eb05a222902b075209c0a23288002e966f61c8e3cbf4c53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4c24cb43da34d4a28eb05a222902b075209c0a23288002e966f61c8e3cbf4c53", kill_on_drop: false }`
[INFO] [stdout] 4c24cb43da34d4a28eb05a222902b075209c0a23288002e966f61c8e3cbf4c53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d23284d9fd243626f74a635466a867ce0613cb05abfaadcb656abd6ddf7b84d9
[INFO] running `Command { std: "docker" "start" "-a" "d23284d9fd243626f74a635466a867ce0613cb05abfaadcb656abd6ddf7b84d9", kill_on_drop: false }`
[INFO] [stderr]     Checking rustradix v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/lib.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> src/lib.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Tree<T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `find` is never used
[INFO] [stdout]   --> src/lib.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> Tree<T> {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] 16 |     fn find(&self, mut key: String) -> Option<&T> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 |             return if !parent.value.is_none() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `parent.value.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:34:39
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   return if !child.value.is_none() {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^ help: try: `child.value.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `parent.value` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 19 |             return if !parent.value.is_none() {
[INFO] [stdout]    |                        ---------------------- the check is happening here
[INFO] [stdout] 20 |                 Some(&parent.value.as_ref().unwrap())
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `child.value` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   return if !child.value.is_none() {
[INFO] [stdout]    |                                  --------------------- the check is happening here
[INFO] [stdout] 35 | ...                       Some(&child.value.as_ref().unwrap())
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]   --> src/lib.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |         if key == "" {
[INFO] [stdout]    |            ^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `key.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]    = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 Some(&parent.value.as_ref().unwrap())
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `parent.value.as_ref().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `.bytes().nth().unwrap()` on a `String`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |             let c = key.bytes().nth(0).unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `key.as_bytes()[0]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bytes_nth
[INFO] [stdout]    = note: `#[warn(clippy::bytes_nth)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 | ...                   Some(&child.value.as_ref().unwrap())
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `child.value.as_ref().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:40:38
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   parent = &child;
[INFO] [stdout]    |                                ^^^^^^ help: change this to: `child`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `path` is never read
[INFO] [stdout]  --> src/lib.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Node<T> {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] 2 |     prefix: String,
[INFO] [stdout] 3 |     path: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:19:23
[INFO] [stdout]    |
[INFO] [stdout] 19 |             return if !parent.value.is_none() {
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^ help: try: `parent.value.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/lib.rs:34:39
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   return if !child.value.is_none() {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^ help: try: `child.value.is_some()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `parent.value` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:20:23
[INFO] [stdout]    |
[INFO] [stdout] 19 |             return if !parent.value.is_none() {
[INFO] [stdout]    |                        ---------------------- the check is happening here
[INFO] [stdout] 20 |                 Some(&parent.value.as_ref().unwrap())
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout]    = note: `#[warn(clippy::unnecessary_unwrap)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `unwrap` on `child.value` after checking its variant with `is_none`
[INFO] [stdout]   --> src/lib.rs:35:39
[INFO] [stdout]    |
[INFO] [stdout] 34 | ...                   return if !child.value.is_none() {
[INFO] [stdout]    |                                  --------------------- the check is happening here
[INFO] [stdout] 35 | ...                       Some(&child.value.as_ref().unwrap())
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: try using `match`
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: comparison to empty slice
[INFO] [stdout]   --> src/lib.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |         if key == "" {
[INFO] [stdout]    |            ^^^^^^^^^ help: using `is_empty` is clearer and more explicit: `key.is_empty()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_to_empty
[INFO] [stdout]    = note: `#[warn(clippy::comparison_to_empty)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:20:22
[INFO] [stdout]    |
[INFO] [stdout] 20 |                 Some(&parent.value.as_ref().unwrap())
[INFO] [stdout]    |                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `parent.value.as_ref().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout]    = note: `#[warn(clippy::needless_borrow)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: called `.bytes().nth().unwrap()` on a `String`
[INFO] [stdout]   --> src/lib.rs:27:21
[INFO] [stdout]    |
[INFO] [stdout] 27 |             let c = key.bytes().nth(0).unwrap();
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `key.as_bytes()[0]`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#bytes_nth
[INFO] [stdout]    = note: `#[warn(clippy::bytes_nth)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:35:38
[INFO] [stdout]    |
[INFO] [stdout] 35 | ...                   Some(&child.value.as_ref().unwrap())
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: change this to: `child.value.as_ref().unwrap()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this expression creates a reference which is immediately dereferenced by the compiler
[INFO] [stdout]   --> src/lib.rs:40:38
[INFO] [stdout]    |
[INFO] [stdout] 40 | ...                   parent = &child;
[INFO] [stdout]    |                                ^^^^^^ help: change this to: `child`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "d23284d9fd243626f74a635466a867ce0613cb05abfaadcb656abd6ddf7b84d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d23284d9fd243626f74a635466a867ce0613cb05abfaadcb656abd6ddf7b84d9", kill_on_drop: false }`
[INFO] [stdout] d23284d9fd243626f74a635466a867ce0613cb05abfaadcb656abd6ddf7b84d9