[INFO] cloning repository https://github.com/dai-dao/rust-algorithms
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dai-dao/rust-algorithms" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdai-dao%2Frust-algorithms", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdai-dao%2Frust-algorithms'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14b2c1ec443cbee164e8c4c2c5ca9d90d727564d
[INFO] linting dai-dao/rust-algorithms against nightly for clippy-nonminimal_bool-denied
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdai-dao%2Frust-algorithms" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dai-dao/rust-algorithms
[INFO] finished tweaking git repo https://github.com/dai-dao/rust-algorithms
[INFO] tweaked toml for git repo https://github.com/dai-dao/rust-algorithms written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dai-dao/rust-algorithms on toolchain nightly
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+nightly" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dai-dao/rust-algorithms 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" "+nightly" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f9a48672a6525266df4df2ff676a8139f4a8784c1ad2aa3e60194c70294d73f5
[INFO] running `Command { std: "docker" "start" "-a" "f9a48672a6525266df4df2ff676a8139f4a8784c1ad2aa3e60194c70294d73f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f9a48672a6525266df4df2ff676a8139f4a8784c1ad2aa3e60194c70294d73f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f9a48672a6525266df4df2ff676a8139f4a8784c1ad2aa3e60194c70294d73f5", kill_on_drop: false }`
[INFO] [stdout] f9a48672a6525266df4df2ff676a8139f4a8784c1ad2aa3e60194c70294d73f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+nightly" "clippy" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e1a70c2cd5e74c09b614767738d53d4ce28c8921386c36d7382471fdfdf4a069
[INFO] running `Command { std: "docker" "start" "-a" "e1a70c2cd5e74c09b614767738d53d4ce28c8921386c36d7382471fdfdf4a069", kill_on_drop: false }`
[INFO] [stderr]     Checking challenge v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |         return Node { val : val, next : None }
[INFO] [stdout]    |                       ^^^^^^^^^ help: replace it with: `val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]    = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: redundant field names in struct initialization
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:12:23
[INFO] [stdout]    |
[INFO] [stdout] 12 |         return Node { val : val, next : None }
[INFO] [stdout]    |                       ^^^^^^^^^ help: replace it with: `val`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_field_names
[INFO] [stdout]    = note: `#[warn(clippy::redundant_field_names)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let mut a = &mut l1.clone();
[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/rs/add_two_number_linked_list.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut b = &mut l2.clone();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         return Node { value : val, left : None, right : None };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 14 -         return Node { value : val, left : None, right : None };
[INFO] [stdout] 14 +         Node { value : val, left : None, right : None }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 return true;
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 28 -                 return true;
[INFO] [stdout] 28 +                 true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |                 return false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -                 return false;
[INFO] [stdout] 30 +                 false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             return true;
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 33 -             return true;
[INFO] [stdout] 33 +             true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this if-then-else expression returns a bool literal
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | /             if node_box.value > low && node_box.value < high &&
[INFO] [stdout] 25 | |                 Solution::_is_valid_bst_helper(node_box.left, low, node_box.value) &&
[INFO] [stdout] 26 | |                 Solution::_is_valid_bst_helper(node_box.right, node_box.value, high)
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |                 return false;
[INFO] [stdout] 31 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stdout]    = note: `#[warn(clippy::needless_bool)]` on by default
[INFO] [stdout] help: you can reduce it to
[INFO] [stdout]    |
[INFO] [stdout] 24 ~             return node_box.value > low && node_box.value < high &&
[INFO] [stdout] 25 +                 Solution::_is_valid_bst_helper(node_box.left, low, node_box.value) && Solution::_is_valid_bst_helper(node_box.right, node_box.value, high)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let mut a = &mut l1.clone();
[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/rs/add_two_number_linked_list.rs:41:13
[INFO] [stdout]    |
[INFO] [stdout] 41 |         let mut b = &mut l2.clone();
[INFO] [stdout]    |             ----^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         return Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 38 -         return Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100);
[INFO] [stdout] 38 +         Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/ransom_note.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         return true
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 -         return true
[INFO] [stdout] 25 +         true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |         return Node { value : val, left : None, right : None };
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout]    = note: `#[warn(clippy::needless_return)]` on by default
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 14 -         return Node { value : val, left : None, right : None };
[INFO] [stdout] 14 +         Node { value : val, left : None, right : None }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:28:17
[INFO] [stdout]    |
[INFO] [stdout] 28 |                 return true;
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 28 -                 return true;
[INFO] [stdout] 28 +                 true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |                 return false;
[INFO] [stdout]    |                 ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 30 -                 return false;
[INFO] [stdout] 30 +                 false
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             return true;
[INFO] [stdout]    |             ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 33 -             return true;
[INFO] [stdout] 33 +             true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this if-then-else expression returns a bool literal
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:24:13
[INFO] [stdout]    |
[INFO] [stdout] 24 | /             if node_box.value > low && node_box.value < high &&
[INFO] [stdout] 25 | |                 Solution::_is_valid_bst_helper(node_box.left, low, node_box.value) &&
[INFO] [stdout] 26 | |                 Solution::_is_valid_bst_helper(node_box.right, node_box.value, high)
[INFO] [stdout] ...  |
[INFO] [stdout] 30 | |                 return false;
[INFO] [stdout] 31 | |             }
[INFO] [stdout]    | |_____________^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_bool
[INFO] [stdout]    = note: `#[warn(clippy::needless_bool)]` on by default
[INFO] [stdout] help: you can reduce it to
[INFO] [stdout]    |
[INFO] [stdout] 24 ~             return node_box.value > low && node_box.value < high &&
[INFO] [stdout] 25 +                 Solution::_is_valid_bst_helper(node_box.left, low, node_box.value) && Solution::_is_valid_bst_helper(node_box.right, node_box.value, high)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/valid_binary_search.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |         return Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100);
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 38 -         return Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100);
[INFO] [stdout] 38 +         Solution::_is_valid_bst_helper(Some(Box::new(node)), -100, 100)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         return Node { val : val, next : None }
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 12 -         return Node { val : val, next : None }
[INFO] [stdout] 12 +         Node { val : val, next : None }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/ransom_note.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |         return true
[INFO] [stdout]    |         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 25 -         return true
[INFO] [stdout] 25 +         true
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if !a.next.is_some() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^ help: try: `a.next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |             if !b.next.is_some() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^ help: try: `b.next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         return ret;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -         return ret;
[INFO] [stdout] 59 +         ret
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:84:20
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 if !a.as_ref().unwrap().next.is_some() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a.as_ref().unwrap().next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 if !b.as_ref().unwrap().next.is_some() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b.as_ref().unwrap().next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |         return ret;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 98 -         return ret;
[INFO] [stdout] 98 +         ret
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         return Node { val : val, next : None }
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 12 -         return Node { val : val, next : None }
[INFO] [stdout] 12 +         Node { val : val, next : None }
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |             if !a.next.is_some() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^ help: try: `a.next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout]    = note: `#[warn(clippy::nonminimal_bool)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:50:16
[INFO] [stdout]    |
[INFO] [stdout] 50 |             if !b.next.is_some() {
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^^ help: try: `b.next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |         return ret;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 59 -         return ret;
[INFO] [stdout] 59 +         ret
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:84:20
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 if !a.as_ref().unwrap().next.is_some() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `a.as_ref().unwrap().next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this boolean expression can be simplified
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:87:20
[INFO] [stdout]    |
[INFO] [stdout] 87 |                 if !b.as_ref().unwrap().next.is_some() {
[INFO] [stdout]    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `b.as_ref().unwrap().next.is_none()`
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#nonminimal_bool
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unneeded `return` statement
[INFO] [stdout]   --> src/rs/add_two_number_linked_list.rs:98:9
[INFO] [stdout]    |
[INFO] [stdout] 98 |         return ret;
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stdout] help: remove `return`
[INFO] [stdout]    |
[INFO] [stdout] 98 -         return ret;
[INFO] [stdout] 98 +         ret
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.23s
[INFO] running `Command { std: "docker" "inspect" "e1a70c2cd5e74c09b614767738d53d4ce28c8921386c36d7382471fdfdf4a069", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1a70c2cd5e74c09b614767738d53d4ce28c8921386c36d7382471fdfdf4a069", kill_on_drop: false }`
[INFO] [stdout] e1a70c2cd5e74c09b614767738d53d4ce28c8921386c36d7382471fdfdf4a069