[INFO] cloning repository https://github.com/spk-cpsamut/learn-rust-by-leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/spk-cpsamut/learn-rust-by-leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspk-cpsamut%2Flearn-rust-by-leetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspk-cpsamut%2Flearn-rust-by-leetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 96589809f81de337f748e9e18698e5ee325332f2
[INFO] building spk-cpsamut/learn-rust-by-leetcode against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fspk-cpsamut%2Flearn-rust-by-leetcode" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/spk-cpsamut/learn-rust-by-leetcode on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/spk-cpsamut/learn-rust-by-leetcode
[INFO] finished tweaking git repo https://github.com/spk-cpsamut/learn-rust-by-leetcode
[INFO] tweaked toml for git repo https://github.com/spk-cpsamut/learn-rust-by-leetcode written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/spk-cpsamut/learn-rust-by-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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ef394b5c92cddb5905bf6ea18b0bbfe52e462074bd50ee75f2e028f6b11eab8
[INFO] running `Command { std: "docker" "start" "-a" "3ef394b5c92cddb5905bf6ea18b0bbfe52e462074bd50ee75f2e028f6b11eab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ef394b5c92cddb5905bf6ea18b0bbfe52e462074bd50ee75f2e028f6b11eab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ef394b5c92cddb5905bf6ea18b0bbfe52e462074bd50ee75f2e028f6b11eab8", kill_on_drop: false }`
[INFO] [stdout] 3ef394b5c92cddb5905bf6ea18b0bbfe52e462074bd50ee75f2e028f6b11eab8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58b306949e3cd94ab5200a47633fd17949226f54560bc1d994beb5ecbd455b8b
[INFO] running `Command { std: "docker" "start" "-a" "58b306949e3cd94ab5200a47633fd17949226f54560bc1d994beb5ecbd455b8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/easy14.rs:45:22
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(x) => (),
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/easy14.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `longest_common_prefix` and `add_prefix` are never used
[INFO] [stdout]   --> src/easy14.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 28 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {  
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn add_prefix(strs: Vec<String>, index: &mut usize, longest_common_prefix: &mut String) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/easy20.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_valid` and `handle_close_parenthese` are never used
[INFO] [stdout]   --> src/easy20.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 36 |     pub fn is_valid(s: String) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn handle_close_parenthese(current_parenthese: &String, for_compare_parenthese: Option<String>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/array/easy26.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct  Solution {
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_duplicates` is never used
[INFO] [stdout]   --> src/array/easy26.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 48 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/array/easy27.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_element` is never used
[INFO] [stdout]   --> src/array/easy27.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 54 |     pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "58b306949e3cd94ab5200a47633fd17949226f54560bc1d994beb5ecbd455b8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58b306949e3cd94ab5200a47633fd17949226f54560bc1d994beb5ecbd455b8b", kill_on_drop: false }`
[INFO] [stdout] 58b306949e3cd94ab5200a47633fd17949226f54560bc1d994beb5ecbd455b8b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 32622ff207ed7d3adcf050006533ff3daac9909717646fbeafdd132e0b7d3d1a
[INFO] running `Command { std: "docker" "start" "-a" "32622ff207ed7d3adcf050006533ff3daac9909717646fbeafdd132e0b7d3d1a", kill_on_drop: false }`
[INFO] [stderr]    Compiling leetcode-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/easy14.rs:45:22
[INFO] [stdout]    |
[INFO] [stdout] 45 |                 Some(x) => (),
[INFO] [stdout]    |                      ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/easy14.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `longest_common_prefix` and `add_prefix` are never used
[INFO] [stdout]   --> src/easy14.rs:28:12
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 28 |     pub fn longest_common_prefix(strs: Vec<String>) -> String {  
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn add_prefix(strs: Vec<String>, index: &mut usize, longest_common_prefix: &mut String) {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/easy20.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `is_valid` and `handle_close_parenthese` are never used
[INFO] [stdout]   --> src/easy20.rs:36:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | impl Solution {
[INFO] [stdout]    | ------------- associated functions in this implementation
[INFO] [stdout] 36 |     pub fn is_valid(s: String) -> bool {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 65 |     fn handle_close_parenthese(current_parenthese: &String, for_compare_parenthese: Option<String>) -> bool {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/array/easy26.rs:43:13
[INFO] [stdout]    |
[INFO] [stdout] 43 | pub struct  Solution {
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_duplicates` is never used
[INFO] [stdout]   --> src/array/easy26.rs:48:12
[INFO] [stdout]    |
[INFO] [stdout] 47 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 48 |     pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]   --> src/array/easy27.rs:49:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | pub struct Solution {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `remove_element` is never used
[INFO] [stdout]   --> src/array/easy27.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 53 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 54 |     pub fn remove_element(nums: &mut Vec<i32>, val: i32) -> i32 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "32622ff207ed7d3adcf050006533ff3daac9909717646fbeafdd132e0b7d3d1a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32622ff207ed7d3adcf050006533ff3daac9909717646fbeafdd132e0b7d3d1a", kill_on_drop: false }`
[INFO] [stdout] 32622ff207ed7d3adcf050006533ff3daac9909717646fbeafdd132e0b7d3d1a