[INFO] fetching crate mlinrust 0.1.0...
[INFO] checking mlinrust-0.1.0 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate mlinrust 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mlinrust 0.1.0 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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-2-tc1/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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 91c1f0cdbbf2d57f12126e27f3edc07ec41fec159a858da468558d2cc22f1e2a
[INFO] running `Command { std: "docker" "start" "-a" "91c1f0cdbbf2d57f12126e27f3edc07ec41fec159a858da468558d2cc22f1e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "91c1f0cdbbf2d57f12126e27f3edc07ec41fec159a858da468558d2cc22f1e2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91c1f0cdbbf2d57f12126e27f3edc07ec41fec159a858da468558d2cc22f1e2a", kill_on_drop: false }`
[INFO] [stdout] 91c1f0cdbbf2d57f12126e27f3edc07ec41fec159a858da468558d2cc22f1e2a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cef1e1d225ba7d755cd63bd4a5b9e82b09af73a014a76375fb035b7b9c771767
[INFO] running `Command { std: "docker" "start" "-a" "cef1e1d225ba7d755cd63bd4a5b9e82b09af73a014a76375fb035b7b9c771767", 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 0.93s
[INFO] running `Command { std: "docker" "inspect" "cef1e1d225ba7d755cd63bd4a5b9e82b09af73a014a76375fb035b7b9c771767", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cef1e1d225ba7d755cd63bd4a5b9e82b09af73a014a76375fb035b7b9c771767", kill_on_drop: false }`
[INFO] [stdout] cef1e1d225ba7d755cd63bd4a5b9e82b09af73a014a76375fb035b7b9c771767
[INFO] checking mlinrust-0.1.0 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate mlinrust 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate mlinrust 0.1.0 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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-2-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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 17af5ab2732aeef8d56a0ad9674cef199c641976520bbeb5a86faa0f3dbd4cc3
[INFO] running `Command { std: "docker" "start" "-a" "17af5ab2732aeef8d56a0ad9674cef199c641976520bbeb5a86faa0f3dbd4cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17af5ab2732aeef8d56a0ad9674cef199c641976520bbeb5a86faa0f3dbd4cc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17af5ab2732aeef8d56a0ad9674cef199c641976520bbeb5a86faa0f3dbd4cc3", kill_on_drop: false }`
[INFO] [stdout] 17af5ab2732aeef8d56a0ad9674cef199c641976520bbeb5a86faa0f3dbd4cc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 833973a96e97194fca8e532a180ba20b2bad887507642027ff756ec2d97b6d0d
[INFO] running `Command { std: "docker" "start" "-a" "833973a96e97194fca8e532a180ba20b2bad887507642027ff756ec2d97b6d0d", 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 0.99s
[INFO] running `Command { std: "docker" "inspect" "833973a96e97194fca8e532a180ba20b2bad887507642027ff756ec2d97b6d0d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "833973a96e97194fca8e532a180ba20b2bad887507642027ff756ec2d97b6d0d", kill_on_drop: false }`
[INFO] [stdout] 833973a96e97194fca8e532a180ba20b2bad887507642027ff756ec2d97b6d0d