[INFO] cloning repository https://github.com/crome110/rs-mahjong
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/crome110/rs-mahjong" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrome110%2Frs-mahjong", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrome110%2Frs-mahjong'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 360fcd80785a081752452a74b455e94490eee813
[INFO] checking crome110/rs-mahjong against master#33fdb797f59421c7bbecaa4588ed5d7a31a9494a for pr-87190-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcrome110%2Frs-mahjong" "/workspace/builds/worker-70/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-70/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/crome110/rs-mahjong on toolchain 33fdb797f59421c7bbecaa4588ed5d7a31a9494a
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/crome110/rs-mahjong
[INFO] finished tweaking git repo https://github.com/crome110/rs-mahjong
[INFO] tweaked toml for git repo https://github.com/crome110/rs-mahjong written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] crate git repo https://github.com/crome110/rs-mahjong already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 557fecf910113da7c3d4ce0627b28d923780bed24ccbf702010a9ae2da0bcf78
[INFO] running `Command { std: "docker" "start" "-a" "557fecf910113da7c3d4ce0627b28d923780bed24ccbf702010a9ae2da0bcf78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "557fecf910113da7c3d4ce0627b28d923780bed24ccbf702010a9ae2da0bcf78", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "557fecf910113da7c3d4ce0627b28d923780bed24ccbf702010a9ae2da0bcf78", kill_on_drop: false }`
[INFO] [stdout] 557fecf910113da7c3d4ce0627b28d923780bed24ccbf702010a9ae2da0bcf78
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+33fdb797f59421c7bbecaa4588ed5d7a31a9494a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e8975231499bff81270cb8bf222670dbdac1f767ba282ba1427520e83883634b
[INFO] running `Command { std: "docker" "start" "-a" "e8975231499bff81270cb8bf222670dbdac1f767ba282ba1427520e83883634b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.38
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling cc v1.0.37
[INFO] [stderr]     Checking rustc-demangle v0.1.15
[INFO] [stderr]    Compiling backtrace-sys v0.1.29
[INFO] [stderr]    Compiling quote v0.6.12
[INFO] [stderr]     Checking backtrace v0.3.32
[INFO] [stderr]    Compiling synstructure v0.10.2
[INFO] [stderr]    Compiling failure_derive v0.1.5
[INFO] [stderr]     Checking failure v0.1.5
[INFO] [stderr]     Checking mahjong v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:83:23
[INFO] [stdout]    |
[INFO] [stdout] 83 |         pub rule: Box<Fn(&Wait) -> Option<Han>>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait) -> Option<Han>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |         pub fu: Option<Box<Fn(&bool) -> Fu>>,
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&bool) -> Fu`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:91:70
[INFO] [stdout]    |
[INFO] [stdout] 91 |         pub fn new(name: &str, sub: Option<Box<HandYaku>>, rule: Box<Fn(&Wait) -> Option<Han>>, fu: Option<Box<Fn(&bool) -> Fu>>) -> Self {
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait) -> Option<Han>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:91:112
[INFO] [stdout]    |
[INFO] [stdout] 91 |         pub fn new(name: &str, sub: Option<Box<HandYaku>>, rule: Box<Fn(&Wait) -> Option<Han>>, fu: Option<Box<Fn(&bool) -> Fu>>) -> Self {
[INFO] [stdout]    |                                                                                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&bool) -> Fu`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/yaku.rs:105:23
[INFO] [stdout]     |
[INFO] [stdout] 105 |         pub rule: Box<Fn(&Wait, &Vec<Tile>) -> u32>,
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait, &Vec<Tile>) -> u32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/yaku.rs:111:42
[INFO] [stdout]     |
[INFO] [stdout] 111 |         pub fn new(name: &str, rule: Box<Fn(&Wait, &Vec<Tile>) -> u32>, sub: Option<Box<Yakuman>>) -> Self {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait, &Vec<Tile>) -> u32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:83:23
[INFO] [stdout]    |
[INFO] [stdout] 83 |         pub rule: Box<Fn(&Wait) -> Option<Han>>,
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait) -> Option<Han>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |         pub fu: Option<Box<Fn(&bool) -> Fu>>,
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&bool) -> Fu`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:91:70
[INFO] [stdout]    |
[INFO] [stdout] 91 |         pub fn new(name: &str, sub: Option<Box<HandYaku>>, rule: Box<Fn(&Wait) -> Option<Han>>, fu: Option<Box<Fn(&bool) -> Fu>>) -> Self {
[INFO] [stdout]    |                                                                      ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait) -> Option<Han>`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/yaku.rs:91:112
[INFO] [stdout]    |
[INFO] [stdout] 91 |         pub fn new(name: &str, sub: Option<Box<HandYaku>>, rule: Box<Fn(&Wait) -> Option<Han>>, fu: Option<Box<Fn(&bool) -> Fu>>) -> Self {
[INFO] [stdout]    |                                                                                                                ^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&bool) -> Fu`
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/yaku.rs:105:23
[INFO] [stdout]     |
[INFO] [stdout] 105 |         pub rule: Box<Fn(&Wait, &Vec<Tile>) -> u32>,
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait, &Vec<Tile>) -> u32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/yaku.rs:111:42
[INFO] [stdout]     |
[INFO] [stdout] 111 |         pub fn new(name: &str, rule: Box<Fn(&Wait, &Vec<Tile>) -> u32>, sub: Option<Box<Yakuman>>) -> Self {
[INFO] [stdout]     |                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Wait, &Vec<Tile>) -> u32`
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pong`
[INFO] [stdout]    --> src/parse.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 |     fn pong(&self) -> &Box<Option<Node>> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `situation`
[INFO] [stdout]   --> src/evaluate.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     situation: Vec<SituationYaku>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dora`
[INFO] [stdout]   --> src/evaluate.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     dora: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ura_dora`
[INFO] [stdout]   --> src/evaluate.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     ura_dora: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate`
[INFO] [stdout]    --> src/evaluate.rs:532:12
[INFO] [stdout]     |
[INFO] [stdout] 532 |     pub fn evaluate(&self, parsed_hand: &ParsedHand, draw: bool, situation: &Vec<SituationYaku>) -> Option<Evaluated> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate_str`
[INFO] [stdout]    --> src/evaluate.rs:618:12
[INFO] [stdout]     |
[INFO] [stdout] 618 |     pub fn evaluate_str(&self, string: &str, draw: bool, situation: &Vec<SituationYaku>) -> Result<Option<Evaluated>, failure::Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/parse.rs:225:9
[INFO] [stdout]     |
[INFO] [stdout] 225 |         &self.pong.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[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] 225 |         let _ = &self.pong.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/parse.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |         &self.chow.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 226 |         let _ = &self.chow.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `pong`
[INFO] [stdout]    --> src/parse.rs:158:8
[INFO] [stdout]     |
[INFO] [stdout] 158 |     fn pong(&self) -> &Box<Option<Node>> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `situation`
[INFO] [stdout]   --> src/evaluate.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     situation: Vec<SituationYaku>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dora`
[INFO] [stdout]   --> src/evaluate.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 24 |     dora: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `ura_dora`
[INFO] [stdout]   --> src/evaluate.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 26 |     ura_dora: Vec<Tile>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate`
[INFO] [stdout]    --> src/evaluate.rs:532:12
[INFO] [stdout]     |
[INFO] [stdout] 532 |     pub fn evaluate(&self, parsed_hand: &ParsedHand, draw: bool, situation: &Vec<SituationYaku>) -> Option<Evaluated> {
[INFO] [stdout]     |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `evaluate_str`
[INFO] [stdout]    --> src/evaluate.rs:618:12
[INFO] [stdout]     |
[INFO] [stdout] 618 |     pub fn evaluate_str(&self, string: &str, draw: bool, situation: &Vec<SituationYaku>) -> Result<Option<Evaluated>, failure::Error> {
[INFO] [stdout]     |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/parse.rs:225:9
[INFO] [stdout]     |
[INFO] [stdout] 225 |         &self.pong.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[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] 225 |         let _ = &self.pong.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/parse.rs:226:9
[INFO] [stdout]     |
[INFO] [stdout] 226 |         &self.chow.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 226 |         let _ = &self.chow.clone().map(|ref node| vec.append(&mut node.search_leafs()));
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 14 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.39s
[INFO] running `Command { std: "docker" "inspect" "e8975231499bff81270cb8bf222670dbdac1f767ba282ba1427520e83883634b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8975231499bff81270cb8bf222670dbdac1f767ba282ba1427520e83883634b", kill_on_drop: false }`
[INFO] [stdout] e8975231499bff81270cb8bf222670dbdac1f767ba282ba1427520e83883634b