[INFO] fetching crate skiplist-rs 0.1.5...
[INFO] testing skiplist-rs-0.1.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate skiplist-rs 0.1.5 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate skiplist-rs 0.1.5 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate skiplist-rs 0.1.5
[INFO] finished tweaking crates.io crate skiplist-rs 0.1.5
[INFO] tweaked toml for crates.io crate skiplist-rs 0.1.5 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7a3ab70f97ed059fee3b734865e7e8b13c2902ea7a973267850c5af612b8aed3
[INFO] running `Command { std: "docker" "start" "-a" "7a3ab70f97ed059fee3b734865e7e8b13c2902ea7a973267850c5af612b8aed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7a3ab70f97ed059fee3b734865e7e8b13c2902ea7a973267850c5af612b8aed3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a3ab70f97ed059fee3b734865e7e8b13c2902ea7a973267850c5af612b8aed3", kill_on_drop: false }`
[INFO] [stdout] 7a3ab70f97ed059fee3b734865e7e8b13c2902ea7a973267850c5af612b8aed3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1eb79152da0467223fba533a253b49586f7d3eb9efb3ac70587e078c9aa18cbc
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1eb79152da0467223fba533a253b49586f7d3eb9efb3ac70587e078c9aa18cbc", kill_on_drop: false }`
[INFO] [stderr]    Compiling skiplist-rs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 56 |             let mut fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             ------------------------------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 83 |             let fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 293 |         /// 假定不断向右靠近最佳位置
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 294 |         let mut direct_right = true;
[INFO] [stdout]     |         ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:300:17
[INFO] [stdout]     |
[INFO] [stdout] 300 |                   /// 根据两者的值来判断，位移方向应该是向左，还是向右
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 301 | /                 if t.as_ref().score < *score {
[INFO] [stdout] 302 | |                     direct_right = false;
[INFO] [stdout] 303 | |                 }
[INFO] [stdout]     | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:316:25
[INFO] [stdout]     |
[INFO] [stdout] 316 |                           /// 因score本身较小，往右遍历找到比自己小的节点，在该节点左侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | /                         true => {
[INFO] [stdout] 318 | |                             if *score > n.as_ref().score {
[INFO] [stdout] 319 | |                                 return Some(InsertPosition::new(cur_ptr, false));
[INFO] [stdout] 320 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 324 | |                             next_position = n.as_ref().next;
[INFO] [stdout] 325 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:326:25
[INFO] [stdout]     |
[INFO] [stdout] 326 |                           /// 因score本身较大，往左遍历找到比自己大的节点，在节点右侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 327 | /                         false => {
[INFO] [stdout] 328 | |                             if *score < n.as_ref().score {
[INFO] [stdout] 329 | |                                 return Some(InsertPosition::new(cur_ptr, true));
[INFO] [stdout] 330 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 334 | |                             next_position = n.as_ref().prev;
[INFO] [stdout] 335 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         for i in 0..10 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:37
[INFO] [stdout]    |
[INFO] [stdout] 90 |                         if let Some(t) = n.as_ref().tower_below {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:208:21
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 let b = Box::from_raw(n.as_ptr());
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:295:21
[INFO] [stdout]     |
[INFO] [stdout] 295 |         if let Some(t) = find_position {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `next_position` is never read
[INFO] [stdout]    --> src/lib.rs:314:29
[INFO] [stdout]     |
[INFO] [stdout] 314 |                     let mut next_position: Option<NonNull<Node<T, V>>> = None;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[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/lib.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let mut paths = self.find_path(score);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:182:21
[INFO] [stdout]     |
[INFO] [stdout] 182 |                 let mut front = n.as_ref().prev;
[INFO] [stdout]     |                     ----^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 let mut next = n.as_ref().next;
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |         if let Some(mut position) = insert_position {
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:268:21
[INFO] [stdout]     |
[INFO] [stdout] 268 |                 let mut cur_ptr = prev_ptr.as_ref().next;
[INFO] [stdout]     |                     ----^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/lib.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn get(&self, score: &T) -> Option<&V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.54s
[INFO] running `Command { std: "docker" "inspect" "1eb79152da0467223fba533a253b49586f7d3eb9efb3ac70587e078c9aa18cbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1eb79152da0467223fba533a253b49586f7d3eb9efb3ac70587e078c9aa18cbc", kill_on_drop: false }`
[INFO] [stdout] 1eb79152da0467223fba533a253b49586f7d3eb9efb3ac70587e078c9aa18cbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f5bbf54dc5aae4884834f15576c02438d6f7312cadf777b2824b24ed86029e9e
[INFO] running `Command { std: "docker" "start" "-a" "f5bbf54dc5aae4884834f15576c02438d6f7312cadf777b2824b24ed86029e9e", kill_on_drop: false }`
[INFO] [stderr]    Compiling skiplist-rs v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 56 |             let mut fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             ------------------------------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 83 |             let fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 293 |         /// 假定不断向右靠近最佳位置
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 294 |         let mut direct_right = true;
[INFO] [stdout]     |         ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:300:17
[INFO] [stdout]     |
[INFO] [stdout] 300 |                   /// 根据两者的值来判断，位移方向应该是向左，还是向右
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 301 | /                 if t.as_ref().score < *score {
[INFO] [stdout] 302 | |                     direct_right = false;
[INFO] [stdout] 303 | |                 }
[INFO] [stdout]     | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:316:25
[INFO] [stdout]     |
[INFO] [stdout] 316 |                           /// 因score本身较小，往右遍历找到比自己小的节点，在该节点左侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | /                         true => {
[INFO] [stdout] 318 | |                             if *score > n.as_ref().score {
[INFO] [stdout] 319 | |                                 return Some(InsertPosition::new(cur_ptr, false));
[INFO] [stdout] 320 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 324 | |                             next_position = n.as_ref().next;
[INFO] [stdout] 325 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:326:25
[INFO] [stdout]     |
[INFO] [stdout] 326 |                           /// 因score本身较大，往左遍历找到比自己大的节点，在节点右侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 327 | /                         false => {
[INFO] [stdout] 328 | |                             if *score < n.as_ref().score {
[INFO] [stdout] 329 | |                                 return Some(InsertPosition::new(cur_ptr, true));
[INFO] [stdout] 330 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 334 | |                             next_position = n.as_ref().prev;
[INFO] [stdout] 335 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         for i in 0..10 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:37
[INFO] [stdout]    |
[INFO] [stdout] 90 |                         if let Some(t) = n.as_ref().tower_below {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:208:21
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 let b = Box::from_raw(n.as_ptr());
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:295:21
[INFO] [stdout]     |
[INFO] [stdout] 295 |         if let Some(t) = find_position {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `next_position` is never read
[INFO] [stdout]    --> src/lib.rs:314:29
[INFO] [stdout]     |
[INFO] [stdout] 314 |                     let mut next_position: Option<NonNull<Node<T, V>>> = None;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[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/lib.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let mut paths = self.find_path(score);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:182:21
[INFO] [stdout]     |
[INFO] [stdout] 182 |                 let mut front = n.as_ref().prev;
[INFO] [stdout]     |                     ----^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 let mut next = n.as_ref().next;
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |         if let Some(mut position) = insert_position {
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:268:21
[INFO] [stdout]     |
[INFO] [stdout] 268 |                 let mut cur_ptr = prev_ptr.as_ref().next;
[INFO] [stdout]     |                     ----^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `get`
[INFO] [stdout]   --> src/lib.rs:77:8
[INFO] [stdout]    |
[INFO] [stdout] 77 |     fn get(&self, score: &T) -> Option<&V> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:55:13
[INFO] [stdout]    |
[INFO] [stdout] 55 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 56 |             let mut fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             ------------------------------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]   --> src/lib.rs:82:13
[INFO] [stdout]    |
[INFO] [stdout] 82 |             ///在查找的过程中也可以执行插入操作
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 83 |             let fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stdout]    |             -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]    |
[INFO] [stdout]    = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:293:9
[INFO] [stdout]     |
[INFO] [stdout] 293 |         /// 假定不断向右靠近最佳位置
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 294 |         let mut direct_right = true;
[INFO] [stdout]     |         ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:300:17
[INFO] [stdout]     |
[INFO] [stdout] 300 |                   /// 根据两者的值来判断，位移方向应该是向左，还是向右
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 301 | /                 if t.as_ref().score < *score {
[INFO] [stdout] 302 | |                     direct_right = false;
[INFO] [stdout] 303 | |                 }
[INFO] [stdout]     | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:316:25
[INFO] [stdout]     |
[INFO] [stdout] 316 |                           /// 因score本身较小，往右遍历找到比自己小的节点，在该节点左侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 317 | /                         true => {
[INFO] [stdout] 318 | |                             if *score > n.as_ref().score {
[INFO] [stdout] 319 | |                                 return Some(InsertPosition::new(cur_ptr, false));
[INFO] [stdout] 320 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 324 | |                             next_position = n.as_ref().next;
[INFO] [stdout] 325 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:326:25
[INFO] [stdout]     |
[INFO] [stdout] 326 |                           /// 因score本身较大，往左遍历找到比自己大的节点，在节点右侧插入
[INFO] [stdout]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 327 | /                         false => {
[INFO] [stdout] 328 | |                             if *score < n.as_ref().score {
[INFO] [stdout] 329 | |                                 return Some(InsertPosition::new(cur_ptr, true));
[INFO] [stdout] 330 | |                             }
[INFO] [stdout] ...   |
[INFO] [stdout] 334 | |                             next_position = n.as_ref().prev;
[INFO] [stdout] 335 | |                         }
[INFO] [stdout]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp::Ordering`
[INFO] [stdout]    --> src/lib.rs:461:9
[INFO] [stdout]     |
[INFO] [stdout] 461 |     use std::cmp::Ordering;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/lib.rs:460:1
[INFO] [stdout]     |
[INFO] [stdout] 460 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt`
[INFO] [stdout]    --> src/lib.rs:462:9
[INFO] [stdout]     |
[INFO] [stdout] 462 |     use std::fmt;
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stdout]    --> src/lib.rs:460:1
[INFO] [stdout]     |
[INFO] [stdout] 460 | mod tests {
[INFO] [stdout]     | ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/lib.rs:16:13
[INFO] [stdout]    |
[INFO] [stdout] 16 |         for i in 0..10 {
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/lib.rs:90:37
[INFO] [stdout]    |
[INFO] [stdout] 90 |                         if let Some(t) = n.as_ref().tower_below {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]    --> src/lib.rs:208:21
[INFO] [stdout]     |
[INFO] [stdout] 208 |                 let b = Box::from_raw(n.as_ptr());
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]    --> src/lib.rs:295:21
[INFO] [stdout]     |
[INFO] [stdout] 295 |         if let Some(t) = find_position {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `next_position` is never read
[INFO] [stdout]    --> src/lib.rs:314:29
[INFO] [stdout]     |
[INFO] [stdout] 314 |                     let mut next_position: Option<NonNull<Node<T, V>>> = None;
[INFO] [stdout]     |                             ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lib.rs:486:13
[INFO] [stdout]     |
[INFO] [stdout] 486 |         let y: f64 = rng.gen();
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:114:13
[INFO] [stdout]     |
[INFO] [stdout] 114 |         let mut paths = self.find_path(score);
[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: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:182:21
[INFO] [stdout]     |
[INFO] [stdout] 182 |                 let mut front = n.as_ref().prev;
[INFO] [stdout]     |                     ----^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:183:21
[INFO] [stdout]     |
[INFO] [stdout] 183 |                 let mut next = n.as_ref().next;
[INFO] [stdout]     |                     ----^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:217:21
[INFO] [stdout]     |
[INFO] [stdout] 217 |         if let Some(mut position) = insert_position {
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:268:21
[INFO] [stdout]     |
[INFO] [stdout] 268 |                 let mut cur_ptr = prev_ptr.as_ref().next;
[INFO] [stdout]     |                     ----^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 19 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.66s
[INFO] running `Command { std: "docker" "inspect" "f5bbf54dc5aae4884834f15576c02438d6f7312cadf777b2824b24ed86029e9e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5bbf54dc5aae4884834f15576c02438d6f7312cadf777b2824b24ed86029e9e", kill_on_drop: false }`
[INFO] [stdout] f5bbf54dc5aae4884834f15576c02438d6f7312cadf777b2824b24ed86029e9e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 71b347840775f56ae974053d9ed7cc04ac283db0e923440c821ad4ee1e6be98e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "71b347840775f56ae974053d9ed7cc04ac283db0e923440c821ad4ee1e6be98e", kill_on_drop: false }`
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:55:13
[INFO] [stderr]    |
[INFO] [stderr] 55 |             ///在查找的过程中也可以执行插入操作
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 56 |             let mut fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stderr]    |             ------------------------------------------------------------------------ rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> src/lib.rs:82:13
[INFO] [stderr]    |
[INFO] [stderr] 82 |             ///在查找的过程中也可以执行插入操作
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 83 |             let fit_position = list.find(score, find_position, self.is_tracing);
[INFO] [stderr]    |             -------------------------------------------------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:293:9
[INFO] [stderr]     |
[INFO] [stderr] 293 |         /// 假定不断向右靠近最佳位置
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 294 |         let mut direct_right = true;
[INFO] [stderr]     |         ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]     |
[INFO] [stderr]     = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:300:17
[INFO] [stderr]     |
[INFO] [stderr] 300 |                   /// 根据两者的值来判断，位移方向应该是向左，还是向右
[INFO] [stderr]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 301 | /                 if t.as_ref().score < *score {
[INFO] [stderr] 302 | |                     direct_right = false;
[INFO] [stderr] 303 | |                 }
[INFO] [stderr]     | |_________________- rustdoc does not generate documentation for expressions
[INFO] [stderr]     |
[INFO] [stderr]     = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:316:25
[INFO] [stderr]     |
[INFO] [stderr] 316 |                           /// 因score本身较小，往右遍历找到比自己小的节点，在该节点左侧插入
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 317 | /                         true => {
[INFO] [stderr] 318 | |                             if *score > n.as_ref().score {
[INFO] [stderr] 319 | |                                 return Some(InsertPosition::new(cur_ptr, false));
[INFO] [stderr] 320 | |                             }
[INFO] [stderr] ...   |
[INFO] [stderr] 324 | |                             next_position = n.as_ref().next;
[INFO] [stderr] 325 | |                         }
[INFO] [stderr]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stderr]     |
[INFO] [stderr]     = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/lib.rs:326:25
[INFO] [stderr]     |
[INFO] [stderr] 326 |                           /// 因score本身较大，往左遍历找到比自己大的节点，在节点右侧插入
[INFO] [stderr]     |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 327 | /                         false => {
[INFO] [stderr] 328 | |                             if *score < n.as_ref().score {
[INFO] [stderr] 329 | |                                 return Some(InsertPosition::new(cur_ptr, true));
[INFO] [stderr] 330 | |                             }
[INFO] [stderr] ...   |
[INFO] [stderr] 334 | |                             next_position = n.as_ref().prev;
[INFO] [stderr] 335 | |                         }
[INFO] [stderr]     | |_________________________- rustdoc does not generate documentation for match arms
[INFO] [stderr]     |
[INFO] [stderr]     = help: use `//` for a plain comment
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/lib.rs:16:13
[INFO] [stderr]    |
[INFO] [stderr] 16 |         for i in 0..10 {
[INFO] [stderr]    |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/lib.rs:90:37
[INFO] [stderr]    |
[INFO] [stderr] 90 |                         if let Some(t) = n.as_ref().tower_below {
[INFO] [stderr]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]    --> src/lib.rs:208:21
[INFO] [stderr]     |
[INFO] [stderr] 208 |                 let b = Box::from_raw(n.as_ptr());
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]    --> src/lib.rs:295:21
[INFO] [stderr]     |
[INFO] [stderr] 295 |         if let Some(t) = find_position {
[INFO] [stderr]     |                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `next_position` is never read
[INFO] [stderr]    --> src/lib.rs:314:29
[INFO] [stderr]     |
[INFO] [stderr] 314 |                     let mut next_position: Option<NonNull<Node<T, V>>> = None;
[INFO] [stderr]     |                             ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[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/lib.rs:114:13
[INFO] [stderr]     |
[INFO] [stderr] 114 |         let mut paths = self.find_path(score);
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:182:21
[INFO] [stderr]     |
[INFO] [stderr] 182 |                 let mut front = n.as_ref().prev;
[INFO] [stderr]     |                     ----^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:183:21
[INFO] [stderr]     |
[INFO] [stderr] 183 |                 let mut next = n.as_ref().next;
[INFO] [stderr]     |                     ----^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:217:21
[INFO] [stderr]     |
[INFO] [stderr] 217 |         if let Some(mut position) = insert_position {
[INFO] [stderr]     |                     ----^^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:268:21
[INFO] [stderr]     |
[INFO] [stderr] 268 |                 let mut cur_ptr = prev_ptr.as_ref().next;
[INFO] [stderr]     |                     ----^^^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get`
[INFO] [stderr]   --> src/lib.rs:77:8
[INFO] [stderr]    |
[INFO] [stderr] 77 |     fn get(&self, score: &T) -> Option<&V> {
[INFO] [stderr]    |        ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp::Ordering`
[INFO] [stderr]    --> src/lib.rs:461:9
[INFO] [stderr]     |
[INFO] [stderr] 461 |     use std::cmp::Ordering;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]    --> src/lib.rs:460:1
[INFO] [stderr]     |
[INFO] [stderr] 460 | mod tests {
[INFO] [stderr]     | ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fmt`
[INFO] [stderr]    --> src/lib.rs:462:9
[INFO] [stderr]     |
[INFO] [stderr] 462 |     use std::fmt;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr] help: consider adding a `#[cfg(test)]` to the containing module
[INFO] [stderr]    --> src/lib.rs:460:1
[INFO] [stderr]     |
[INFO] [stderr] 460 | mod tests {
[INFO] [stderr]     | ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/lib.rs:486:13
[INFO] [stderr]     |
[INFO] [stderr] 486 |         let y: f64 = rng.gen();
[INFO] [stderr]     |             ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: `skiplist-rs` (lib) generated 17 warnings
[INFO] [stderr] warning: `skiplist-rs` (lib test) generated 19 warnings (16 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/skiplist_rs-ecab9b97a4a963a5)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::test_main ... ok
[INFO] [stdout] test tests::test_iterator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests skiplist-rs
[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" "71b347840775f56ae974053d9ed7cc04ac283db0e923440c821ad4ee1e6be98e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "71b347840775f56ae974053d9ed7cc04ac283db0e923440c821ad4ee1e6be98e", kill_on_drop: false }`
[INFO] [stdout] 71b347840775f56ae974053d9ed7cc04ac283db0e923440c821ad4ee1e6be98e