[INFO] cloning repository https://github.com/lizeyan/learn-rust-leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lizeyan/learn-rust-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flizeyan%2Flearn-rust-leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flizeyan%2Flearn-rust-leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5e3a12fe3e43ff072e1bac4f7dd3b3368a9d22d9
[INFO] checking lizeyan/learn-rust-leetcode against master#01706e1a34c87656fcbfce198608f4cd2ac6461a for pr-135272
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flizeyan%2Flearn-rust-leetcode" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lizeyan/learn-rust-leetcode on toolchain 01706e1a34c87656fcbfce198608f4cd2ac6461a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+01706e1a34c87656fcbfce198608f4cd2ac6461a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lizeyan/learn-rust-leetcode
[INFO] finished tweaking git repo https://github.com/lizeyan/learn-rust-leetcode
[INFO] tweaked toml for git repo https://github.com/lizeyan/learn-rust-leetcode written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/lizeyan/learn-rust-leetcode 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" "+01706e1a34c87656fcbfce198608f4cd2ac6461a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+01706e1a34c87656fcbfce198608f4cd2ac6461a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a4c483ff4289841581a3f037d5c67e71aa583ee5e12dd3073e585de9d66f7505
[INFO] running `Command { std: "docker" "start" "-a" "a4c483ff4289841581a3f037d5c67e71aa583ee5e12dd3073e585de9d66f7505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a4c483ff4289841581a3f037d5c67e71aa583ee5e12dd3073e585de9d66f7505", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a4c483ff4289841581a3f037d5c67e71aa583ee5e12dd3073e585de9d66f7505", kill_on_drop: false }`
[INFO] [stdout] a4c483ff4289841581a3f037d5c67e71aa583ee5e12dd3073e585de9d66f7505
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:819108c5571ea2e421544af4d832f968d213c87fbe3707a016657f43d2f853bc" "/opt/rustwide/cargo-home/bin/cargo" "+01706e1a34c87656fcbfce198608f4cd2ac6461a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] adf20d4e7428214d0adbe13e5e8a59075632b6f5fae24a0241a2f11576f1c07f
[INFO] running `Command { std: "docker" "start" "-a" "adf20d4e7428214d0adbe13e5e8a59075632b6f5fae24a0241a2f11576f1c07f", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/q13.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 _ => (unreachable!()),
[INFO] [stdout]    |                      ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -                 _ => (unreachable!()),
[INFO] [stdout] 27 +                 _ => unreachable!(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/q5.rs:23:59
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     min(radius[2 * rightmost_center - i], (rightmost - i))
[INFO] [stdout]    |                                                           ^             ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 23 -                     min(radius[2 * rightmost_center - i], (rightmost - i))
[INFO] [stdout] 23 +                     min(radius[2 * rightmost_center - i], rightmost - i)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around match arm expression
[INFO] [stdout]   --> src/q13.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 |                 _ => (unreachable!()),
[INFO] [stdout]    |                      ^              ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 27 -                 _ => (unreachable!()),
[INFO] [stdout] 27 +                 _ => unreachable!(),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]   --> src/q5.rs:23:59
[INFO] [stdout]    |
[INFO] [stdout] 23 |                     min(radius[2 * rightmost_center - i], (rightmost - i))
[INFO] [stdout]    |                                                           ^             ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 23 -                     min(radius[2 * rightmost_center - i], (rightmost - i))
[INFO] [stdout] 23 +                     min(radius[2 * rightmost_center - i], rightmost - i)
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/q5.rs:36:77
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let c = radius.iter().enumerate().max_by_key(|(_, &r)| r).map(|(i, &r)| i)
[INFO] [stdout]    |                                                                             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/q9.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn is_palindrome(mut x: i32) -> bool {
[INFO] [stdout]   |                      ----^
[INFO] [stdout]   |                      |
[INFO] [stdout]   |                      help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q13.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q13.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q1_too_sum.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q1_too_sum.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/q2_too_sum.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 8  | impl ListNode {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 9  |     #[inline]
[INFO] [stdout] 10 |     fn new(val: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]   --> src/q2_too_sum.rs:18:7
[INFO] [stdout]    |
[INFO] [stdout] 18 | trait Solution {
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]   --> src/q2_too_sum.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct SolutionImpl;
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse_list` is never used
[INFO] [stdout]   --> src/q2_too_sum.rs:50:4
[INFO] [stdout]    |
[INFO] [stdout] 50 | fn reverse_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q3.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q3.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q4.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q4.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q5.rs:3:7
[INFO] [stdout]   |
[INFO] [stdout] 3 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q5.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Solution` is never used
[INFO] [stdout]  --> src/q9.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Solution {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SolutionImpl` is never constructed
[INFO] [stdout]  --> src/q9.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct SolutionImpl;
[INFO] [stdout]   |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 103 |                 list![2,4,3],
[INFO] [stdout]     |                 ------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 104 |                 list![5,6,4]
[INFO] [stdout]     |                 ------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 106 |             list![7,0,8]
[INFO] [stdout]     |             ------------ in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 112 |                 list![0],
[INFO] [stdout]     |                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 113 |                 list![0]
[INFO] [stdout]     |                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |             list![0]
[INFO] [stdout]     |             -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 121 |                 list![9,9,9,9,9,9,9],
[INFO] [stdout]     |                 -------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 122 |                 list![9,9,9,9]
[INFO] [stdout]     |                 -------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 124 |             list![8,9,9,9,0,0,0,1]
[INFO] [stdout]     |             ---------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 130 |                 list![1],
[INFO] [stdout]     |                 -------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 131 |                 list![9,9,9,9,9,9,9,9,9,9]
[INFO] [stdout]     |                 -------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `current` is never read
[INFO] [stdout]    --> src/q2_too_sum.rs:74:17
[INFO] [stdout]     |
[INFO] [stdout] 74  |                 current = &mut current.as_mut().unwrap().next;
[INFO] [stdout]     |                 ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 133 |             list![0,0,0,0,0,0,0,0,0,0,1]
[INFO] [stdout]     |             ---------------------------- in this macro invocation
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: this warning originates in the macro `list` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r`
[INFO] [stdout]   --> src/q5.rs:36:77
[INFO] [stdout]    |
[INFO] [stdout] 36 |         let c = radius.iter().enumerate().max_by_key(|(_, &r)| r).map(|(i, &r)| i)
[INFO] [stdout]    |                                                                             ^ help: if this is intentional, prefix it with an underscore: `_r`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/q9.rs:7:22
[INFO] [stdout]   |
[INFO] [stdout] 7 |     fn is_palindrome(mut x: i32) -> bool {
[INFO] [stdout]   |                      ----^
[INFO] [stdout]   |                      |
[INFO] [stdout]   |                      help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "adf20d4e7428214d0adbe13e5e8a59075632b6f5fae24a0241a2f11576f1c07f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adf20d4e7428214d0adbe13e5e8a59075632b6f5fae24a0241a2f11576f1c07f", kill_on_drop: false }`
[INFO] [stdout] adf20d4e7428214d0adbe13e5e8a59075632b6f5fae24a0241a2f11576f1c07f
