[INFO] fetching crate mlinrust 0.1.0...
[INFO] checking mlinrust-0.1.0 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate mlinrust 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate mlinrust 0.1.0 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mlinrust 0.1.0
[INFO] finished tweaking crates.io crate mlinrust 0.1.0
[INFO] tweaked toml for crates.io crate mlinrust 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate crates.io crate mlinrust 0.1.0 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" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06c045354fad3d013b819da7b6a550a7061e96c018d84a9caa84bd5b29930fab
[INFO] running `Command { std: "docker" "start" "-a" "06c045354fad3d013b819da7b6a550a7061e96c018d84a9caa84bd5b29930fab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06c045354fad3d013b819da7b6a550a7061e96c018d84a9caa84bd5b29930fab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06c045354fad3d013b819da7b6a550a7061e96c018d84a9caa84bd5b29930fab", kill_on_drop: false }`
[INFO] [stdout] 06c045354fad3d013b819da7b6a550a7061e96c018d84a9caa84bd5b29930fab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dtail_expr_drop_order" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a1c211855bd90faee34b7a7672847178759995d1245c43d6439193e569d45f1
[INFO] running `Command { std: "docker" "start" "-a" "2a1c211855bd90faee34b7a7672847178759995d1245c43d6439193e569d45f1", kill_on_drop: false }`
[INFO] [stderr]     Checking mlinrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/model/decision_tree.rs:97:51
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let mut node = self.root.as_ref().unwrap().clone();
[INFO] [stdout]    |                                                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 97 -         let mut node = self.root.as_ref().unwrap().clone();
[INFO] [stdout] 97 +         let mut node = self.root.as_ref().unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/model/decision_tree.rs:101:52
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 node = &node.left.as_ref().unwrap().clone();
[INFO] [stdout]     |                                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 101 -                 node = &node.left.as_ref().unwrap().clone();
[INFO] [stdout] 101 +                 node = &node.left.as_ref().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/model/decision_tree.rs:103:53
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 node = &node.right.as_ref().unwrap().clone();
[INFO] [stdout]     |                                                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 103 -                 node = &node.right.as_ref().unwrap().clone();
[INFO] [stdout] 103 +                 node = &node.right.as_ref().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]   --> src/model/decision_tree.rs:97:51
[INFO] [stdout]    |
[INFO] [stdout] 97 |         let mut node = self.root.as_ref().unwrap().clone();
[INFO] [stdout]    |                                                   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]    = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]    |
[INFO] [stdout] 97 -         let mut node = self.root.as_ref().unwrap().clone();
[INFO] [stdout] 97 +         let mut node = self.root.as_ref().unwrap();
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/model/decision_tree.rs:101:52
[INFO] [stdout]     |
[INFO] [stdout] 101 |                 node = &node.left.as_ref().unwrap().clone();
[INFO] [stdout]     |                                                    ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 101 -                 node = &node.left.as_ref().unwrap().clone();
[INFO] [stdout] 101 +                 node = &node.left.as_ref().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/model/decision_tree.rs:103:53
[INFO] [stdout]     |
[INFO] [stdout] 103 |                 node = &node.right.as_ref().unwrap().clone();
[INFO] [stdout]     |                                                     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `Box<Node<T>>` does not implement `Clone`, so calling `clone` on `&Box<Node<T>>` copies the reference, which does not do anything and can be removed
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 103 -                 node = &node.right.as_ref().unwrap().clone();
[INFO] [stdout] 103 +                 node = &node.right.as_ref().unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `Command { std: "docker" "inspect" "2a1c211855bd90faee34b7a7672847178759995d1245c43d6439193e569d45f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a1c211855bd90faee34b7a7672847178759995d1245c43d6439193e569d45f1", kill_on_drop: false }`
[INFO] [stdout] 2a1c211855bd90faee34b7a7672847178759995d1245c43d6439193e569d45f1