[INFO] fetching crate splay-tree-rs 0.1.1...
[INFO] testing splay-tree-rs-0.1.1 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate splay-tree-rs 0.1.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate splay-tree-rs 0.1.1
[INFO] finished tweaking crates.io crate splay-tree-rs 0.1.1
[INFO] tweaked toml for crates.io crate splay-tree-rs 0.1.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate splay-tree-rs 0.1.1 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate splay-tree-rs 0.1.1 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" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9485986e10e524e3ecc7b6d39cd64ede303c07aa7cd417d45248c2294d38d9f5
[INFO] running `Command { std: "docker" "start" "-a" "9485986e10e524e3ecc7b6d39cd64ede303c07aa7cd417d45248c2294d38d9f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9485986e10e524e3ecc7b6d39cd64ede303c07aa7cd417d45248c2294d38d9f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9485986e10e524e3ecc7b6d39cd64ede303c07aa7cd417d45248c2294d38d9f5", kill_on_drop: false }`
[INFO] [stdout] 9485986e10e524e3ecc7b6d39cd64ede303c07aa7cd417d45248c2294d38d9f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f9d002dd7aafb1fc301e69696f56c06ebed16630fc974cfa3c4bd1607a39216
[INFO] running `Command { std: "docker" "start" "-a" "0f9d002dd7aafb1fc301e69696f56c06ebed16630fc974cfa3c4bd1607a39216", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling splay-tree-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/node.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut temp = self;
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/node.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut temp = self;
[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/node.rs:86:17
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let mut temp = mem::take(&mut self.left);
[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/tree.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let mut current = &mut self.root.clone();
[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/tree.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let mut parent: &mut SplayNode<K> = &mut None;
[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/tree.rs:210:25
[INFO] [stdout]     |
[INFO] [stdout] 210 |                     let mut right_tree =
[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/tree.rs:212:25
[INFO] [stdout]     |
[INFO] [stdout] 212 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:249:25
[INFO] [stdout]     |
[INFO] [stdout] 249 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     let mut right_tree =
[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/tree.rs:296:25
[INFO] [stdout]     |
[INFO] [stdout] 296 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:297:25
[INFO] [stdout]     |
[INFO] [stdout] 297 |                     let mut left_left_tree =
[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/tree.rs:299:25
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     let mut left_right_tree =
[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/tree.rs:327:25
[INFO] [stdout]     |
[INFO] [stdout] 327 |                     let mut right_tree =
[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/tree.rs:329:25
[INFO] [stdout]     |
[INFO] [stdout] 329 |                     let mut right_right_tree =
[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/tree.rs:331:25
[INFO] [stdout]     |
[INFO] [stdout] 331 |                     let mut right_left_tree =
[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/tree.rs:357:25
[INFO] [stdout]     |
[INFO] [stdout] 357 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:358:25
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     let mut left_right_tree =
[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/tree.rs:390:25
[INFO] [stdout]     |
[INFO] [stdout] 390 |                     let mut right_tree =
[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/tree.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |                     let mut right_left_tree =
[INFO] [stdout]     |                         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] running `Command { std: "docker" "inspect" "0f9d002dd7aafb1fc301e69696f56c06ebed16630fc974cfa3c4bd1607a39216", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f9d002dd7aafb1fc301e69696f56c06ebed16630fc974cfa3c4bd1607a39216", kill_on_drop: false }`
[INFO] [stdout] 0f9d002dd7aafb1fc301e69696f56c06ebed16630fc974cfa3c4bd1607a39216
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d58039bbd542fc542ebd5e47595dfd1539f05558b156a7f6ecfdf7f52ab0c2e0
[INFO] running `Command { std: "docker" "start" "-a" "d58039bbd542fc542ebd5e47595dfd1539f05558b156a7f6ecfdf7f52ab0c2e0", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/node.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut temp = self;
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/node.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut temp = self;
[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/node.rs:86:17
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let mut temp = mem::take(&mut self.left);
[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/tree.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let mut current = &mut self.root.clone();
[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/tree.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let mut parent: &mut SplayNode<K> = &mut None;
[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/tree.rs:210:25
[INFO] [stdout]     |
[INFO] [stdout] 210 |                     let mut right_tree =
[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/tree.rs:212:25
[INFO] [stdout]     |
[INFO] [stdout] 212 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:249:25
[INFO] [stdout]     |
[INFO] [stdout] 249 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     let mut right_tree =
[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/tree.rs:296:25
[INFO] [stdout]     |
[INFO] [stdout] 296 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:297:25
[INFO] [stdout]     |
[INFO] [stdout] 297 |                     let mut left_left_tree =
[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/tree.rs:299:25
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     let mut left_right_tree =
[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/tree.rs:327:25
[INFO] [stdout]     |
[INFO] [stdout] 327 |                     let mut right_tree =
[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/tree.rs:329:25
[INFO] [stdout]     |
[INFO] [stdout] 329 |                     let mut right_right_tree =
[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/tree.rs:331:25
[INFO] [stdout]     |
[INFO] [stdout] 331 |                     let mut right_left_tree =
[INFO] [stdout]     |                         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling splay-tree-rs v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/tree.rs:357:25
[INFO] [stdout]     |
[INFO] [stdout] 357 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:358:25
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     let mut left_right_tree =
[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/tree.rs:390:25
[INFO] [stdout]     |
[INFO] [stdout] 390 |                     let mut right_tree =
[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/tree.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |                     let mut right_left_tree =
[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/node.rs:37:13
[INFO] [stdout]    |
[INFO] [stdout] 37 |         let mut temp = self;
[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: variable does not need to be mutable
[INFO] [stdout]   --> src/node.rs:54:13
[INFO] [stdout]    |
[INFO] [stdout] 54 |         let mut temp = self;
[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/node.rs:86:17
[INFO] [stdout]    |
[INFO] [stdout] 86 |             let mut temp = mem::take(&mut self.left);
[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/tree.rs:145:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |         let mut current = &mut self.root.clone();
[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/tree.rs:146:13
[INFO] [stdout]     |
[INFO] [stdout] 146 |         let mut parent: &mut SplayNode<K> = &mut None;
[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/tree.rs:210:25
[INFO] [stdout]     |
[INFO] [stdout] 210 |                     let mut right_tree =
[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/tree.rs:212:25
[INFO] [stdout]     |
[INFO] [stdout] 212 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:249:25
[INFO] [stdout]     |
[INFO] [stdout] 249 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:271:25
[INFO] [stdout]     |
[INFO] [stdout] 271 |                     let mut right_tree =
[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/tree.rs:296:25
[INFO] [stdout]     |
[INFO] [stdout] 296 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:297:25
[INFO] [stdout]     |
[INFO] [stdout] 297 |                     let mut left_left_tree =
[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/tree.rs:299:25
[INFO] [stdout]     |
[INFO] [stdout] 299 |                     let mut left_right_tree =
[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/tree.rs:327:25
[INFO] [stdout]     |
[INFO] [stdout] 327 |                     let mut right_tree =
[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/tree.rs:329:25
[INFO] [stdout]     |
[INFO] [stdout] 329 |                     let mut right_right_tree =
[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/tree.rs:331:25
[INFO] [stdout]     |
[INFO] [stdout] 331 |                     let mut right_left_tree =
[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/tree.rs:357:25
[INFO] [stdout]     |
[INFO] [stdout] 357 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:358:25
[INFO] [stdout]     |
[INFO] [stdout] 358 |                     let mut left_right_tree =
[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/tree.rs:390:25
[INFO] [stdout]     |
[INFO] [stdout] 390 |                     let mut right_tree =
[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/tree.rs:392:25
[INFO] [stdout]     |
[INFO] [stdout] 392 |                     let mut right_left_tree =
[INFO] [stdout]     |                         ----^^^^^^^^^^^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `Command { std: "docker" "inspect" "d58039bbd542fc542ebd5e47595dfd1539f05558b156a7f6ecfdf7f52ab0c2e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d58039bbd542fc542ebd5e47595dfd1539f05558b156a7f6ecfdf7f52ab0c2e0", kill_on_drop: false }`
[INFO] [stdout] d58039bbd542fc542ebd5e47595dfd1539f05558b156a7f6ecfdf7f52ab0c2e0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=warn" "-e" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b0af9b118828587ce3efc2d5f0f417ca82f46825daff25d67c95726ab85d7e5c
[INFO] running `Command { std: "docker" "start" "-a" "b0af9b118828587ce3efc2d5f0f417ca82f46825daff25d67c95726ab85d7e5c", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/node.rs:37:13
[INFO] [stderr]    |
[INFO] [stderr] 37 |         let mut temp = self;
[INFO] [stderr]    |             ----^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/node.rs:54:13
[INFO] [stderr]    |
[INFO] [stderr] 54 |         let mut temp = self;
[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/node.rs:86:17
[INFO] [stderr]    |
[INFO] [stderr] 86 |             let mut temp = mem::take(&mut self.left);
[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/tree.rs:145:13
[INFO] [stderr]     |
[INFO] [stderr] 145 |         let mut current = &mut self.root.clone();
[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/tree.rs:146:13
[INFO] [stderr]     |
[INFO] [stderr] 146 |         let mut parent: &mut SplayNode<K> = &mut None;
[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/tree.rs:210:25
[INFO] [stderr]     |
[INFO] [stderr] 210 |                     let mut right_tree =
[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/tree.rs:212:25
[INFO] [stderr]     |
[INFO] [stderr] 212 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:249:25
[INFO] [stderr]     |
[INFO] [stderr] 249 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:271:25
[INFO] [stderr]     |
[INFO] [stderr] 271 |                     let mut right_tree =
[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/tree.rs:296:25
[INFO] [stderr]     |
[INFO] [stderr] 296 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:297:25
[INFO] [stderr]     |
[INFO] [stderr] 297 |                     let mut left_left_tree =
[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/tree.rs:299:25
[INFO] [stderr]     |
[INFO] [stderr] 299 |                     let mut left_right_tree =
[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/tree.rs:327:25
[INFO] [stderr]     |
[INFO] [stderr] 327 |                     let mut right_tree =
[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/tree.rs:329:25
[INFO] [stderr]     |
[INFO] [stderr] 329 |                     let mut right_right_tree =
[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/tree.rs:331:25
[INFO] [stderr]     |
[INFO] [stderr] 331 |                     let mut right_left_tree =
[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/tree.rs:357:25
[INFO] [stderr]     |
[INFO] [stderr] 357 |                     let mut left_tree = mem::take(&mut nodeptr.as_ref().unwrap().borrow_mut().left);
[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/tree.rs:358:25
[INFO] [stderr]     |
[INFO] [stderr] 358 |                     let mut left_right_tree =
[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/tree.rs:390:25
[INFO] [stderr]     |
[INFO] [stderr] 390 |                     let mut right_tree =
[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/tree.rs:392:25
[INFO] [stderr]     |
[INFO] [stderr] 392 |                     let mut right_left_tree =
[INFO] [stderr]     |                         ----^^^^^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `splay-tree-rs` (lib) generated 19 warnings (run `cargo fix --lib -p splay-tree-rs` to apply 19 suggestions)
[INFO] [stderr] warning: `splay-tree-rs` (lib test) generated 19 warnings (19 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/splay_tree_rs-3a6fd8563e222345)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test tests::left_most ... ok
[INFO] [stdout] test tests::delete_example ... ok
[INFO] [stdout] test tests::insert_example ... ok
[INFO] [stdout] test tests::same_key ... ok
[INFO] [stdout] test tests::into_iter ... ok
[INFO] [stdout] test tests::splay_nearest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests splay_tree_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" "b0af9b118828587ce3efc2d5f0f417ca82f46825daff25d67c95726ab85d7e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0af9b118828587ce3efc2d5f0f417ca82f46825daff25d67c95726ab85d7e5c", kill_on_drop: false }`
[INFO] [stdout] b0af9b118828587ce3efc2d5f0f417ca82f46825daff25d67c95726ab85d7e5c
