[INFO] cloning repository https://github.com/swirling-wind/leetcode_exercises_in_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/swirling-wind/leetcode_exercises_in_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswirling-wind%2Fleetcode_exercises_in_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswirling-wind%2Fleetcode_exercises_in_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a28422bbb9538aee75a229182c283062610e488
[INFO] checking swirling-wind/leetcode_exercises_in_rust against try#fa4dd1f19bfeb3fd235dc7f1406c42404436bef5 for pr-145108-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswirling-wind%2Fleetcode_exercises_in_rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swirling-wind/leetcode_exercises_in_rust
[INFO] finished tweaking git repo https://github.com/swirling-wind/leetcode_exercises_in_rust
[INFO] tweaked toml for git repo https://github.com/swirling-wind/leetcode_exercises_in_rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swirling-wind/leetcode_exercises_in_rust on toolchain fa4dd1f19bfeb3fd235dc7f1406c42404436bef5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swirling-wind/leetcode_exercises_in_rust 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" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking swirling-wind/leetcode_exercises_in_rust against try#fa4dd1f19bfeb3fd235dc7f1406c42404436bef5 for pr-145108-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswirling-wind%2Fleetcode_exercises_in_rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/swirling-wind/leetcode_exercises_in_rust
[INFO] finished tweaking git repo https://github.com/swirling-wind/leetcode_exercises_in_rust
[INFO] tweaked toml for git repo https://github.com/swirling-wind/leetcode_exercises_in_rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/swirling-wind/leetcode_exercises_in_rust on toolchain fa4dd1f19bfeb3fd235dc7f1406c42404436bef5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/swirling-wind/leetcode_exercises_in_rust 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" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b20efa8df0d401d8f9025237943249ba8fd7df155f0c32df498d963d08916225
[INFO] running `Command { std: "docker" "start" "-a" "b20efa8df0d401d8f9025237943249ba8fd7df155f0c32df498d963d08916225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b20efa8df0d401d8f9025237943249ba8fd7df155f0c32df498d963d08916225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b20efa8df0d401d8f9025237943249ba8fd7df155f0c32df498d963d08916225", kill_on_drop: false }`
[INFO] [stdout] b20efa8df0d401d8f9025237943249ba8fd7df155f0c32df498d963d08916225
[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" "-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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+fa4dd1f19bfeb3fd235dc7f1406c42404436bef5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 459ea25495ede055add30a2c53900d79fef7165e3266a284aa23b602cd05ad44
[INFO] running `Command { std: "docker" "start" "-a" "459ea25495ede055add30a2c53900d79fef7165e3266a284aa23b602cd05ad44", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode_exercises_in_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/cw_10_23.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             (todo!());
[INFO] [stdout]    |              ------- any code following this expression is unreachable
[INFO] [stdout] 22 |             trial_sqrt -= 1;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/cw_10_23.rs:22:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |             (todo!());
[INFO] [stdout]    |              ------- any code following this expression is unreachable
[INFO] [stdout] 22 |             trial_sqrt -= 1;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cw_10_23.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut result: Vec<i64> = vec![];
[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/cw_10_23.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut remains = n.pow(2);
[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/cw_10_23.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn inner_decompose(mut remains: i32, next_sqrt: i32)-> Option<Vec<i64>> {
[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/cw_10_23.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         let mut trial_sqrt = next_sqrt;
[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/cw_10_23.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut temp_result: Option<Vec<i64>> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `decompose` is never used
[INFO] [stdout]  --> src/cw_10_23.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn decompose(n: i64) -> Option<Vec<i64>> {
[INFO] [stdout]   |    ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `testing` is never used
[INFO] [stdout]   --> src/cw_10_23.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn testing(n: i64, exp: Option<Vec<i64>>) -> () {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/cw_10_23.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut result: Vec<i64> = vec![];
[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/cw_10_23.rs:29:9
[INFO] [stdout]    |
[INFO] [stdout] 29 |     let mut remains = n.pow(2);
[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/cw_10_23.rs:3:24
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn inner_decompose(mut remains: i32, next_sqrt: i32)-> Option<Vec<i64>> {
[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/cw_10_23.rs:4:13
[INFO] [stdout]   |
[INFO] [stdout] 4 |         let mut trial_sqrt = next_sqrt;
[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/cw_10_23.rs:5:13
[INFO] [stdout]   |
[INFO] [stdout] 5 |         let mut temp_result: Option<Vec<i64>> = None;
[INFO] [stdout]   |             ----^^^^^^^^^^^
[INFO] [stdout]   |             |
[INFO] [stdout]   |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `inner_decompose` is never used
[INFO] [stdout]  --> src/cw_10_23.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn inner_decompose(mut remains: i32, next_sqrt: i32)-> Option<Vec<i64>> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "459ea25495ede055add30a2c53900d79fef7165e3266a284aa23b602cd05ad44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "459ea25495ede055add30a2c53900d79fef7165e3266a284aa23b602cd05ad44", kill_on_drop: false }`
[INFO] [stdout] 459ea25495ede055add30a2c53900d79fef7165e3266a284aa23b602cd05ad44
