[INFO] updating cached repository https://github.com/SuanFaRuoJi/coding_exercise_rust
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/SuanFaRuoJi/coding_exercise_rust
[INFO] [stderr]    c671886..ea469d4  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea469d4faf3b9ccffedd14306156698b5cc1f2a9
[INFO] checking SuanFaRuoJi/coding_exercise_rust against try#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSuanFaRuoJi%2Fcoding_exercise_rust" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/SuanFaRuoJi/coding_exercise_rust on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/SuanFaRuoJi/coding_exercise_rust
[INFO] finished tweaking git repo https://github.com/SuanFaRuoJi/coding_exercise_rust
[INFO] tweaked toml for git repo https://github.com/SuanFaRuoJi/coding_exercise_rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/SuanFaRuoJi/coding_exercise_rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 04fd09a9535ddf9db6f107ef78063e73facf6ab9b015a11bf57e180390f52ca8
[INFO] running `"docker" "start" "-a" "04fd09a9535ddf9db6f107ef78063e73facf6ab9b015a11bf57e180390f52ca8"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/lib.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `fraction` should have an upper camel case name
[INFO] [stderr]   --> src/max_points_on_a_line_149.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct fraction {
[INFO] [stderr]    |        ^^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Fraction`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/evaluate_reverse_polish_notation_150.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/valid_triangle_number_611.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/graph_valid_tree_261.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> src/shortest_word_distance_2_244.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/lib.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cell::RefCell`
[INFO] [stderr]  --> src/lib.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::cell::RefCell;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type `fraction` should have an upper camel case name
[INFO] [stderr]   --> src/max_points_on_a_line_149.rs:17:8
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct fraction {
[INFO] [stderr]    |        ^^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Fraction`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_camel_case_types)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/evaluate_reverse_polish_notation_150.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/valid_triangle_number_611.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::convert::TryInto`
[INFO] [stderr]  --> src/graph_valid_tree_261.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::convert::TryInto;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::borrow::BorrowMut`
[INFO] [stderr]  --> src/shortest_word_distance_2_244.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::borrow::BorrowMut;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Borrow`
[INFO] [stderr]  --> src/kth_smallest_elements_in_a_bst_230.rs:4:30
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::borrow::{BorrowMut, Borrow};
[INFO] [stderr]   |                              ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prev`
[INFO] [stderr]   --> src/graph_valid_tree_261.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut prev = -1;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:26:23
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn inc(&mut self, key: String) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn dec(&mut self, key: String) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph_valid_tree_261.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut prev = -1;
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `backtrace`
[INFO] [stderr]   --> src/longest_palindrome_subsequence_516.rs:34:4
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn backtrace(string: &Vec<i32>, left: usize, right: usize, dp: &mut Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AllOne`
[INFO] [stderr]  --> src/all_O_one_data_structure_432.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct AllOne {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `inc`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn inc(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dec`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn dec(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_max_key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn get_max_key(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_min_key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn get_min_key(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `all_O_one_data_structure_432` should have a snake case name
[INFO] [stderr]   --> src/lib.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub mod all_O_one_data_structure_432;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `all_o_one_data_structure_432`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `valBox` should have a snake case name
[INFO] [stderr]   --> src/kth_smallest_elements_in_a_bst_230.rs:15:14
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Some(valBox) => {
[INFO] [stderr]    |              ^^^^^^ help: convert the identifier to snake case: `val_box`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Borrow`
[INFO] [stderr]  --> src/kth_smallest_elements_in_a_bst_230.rs:4:30
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::borrow::{BorrowMut, Borrow};
[INFO] [stderr]   |                              ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `prev`
[INFO] [stderr]   --> src/graph_valid_tree_261.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut prev = -1;
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_prev`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:26:23
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn inc(&mut self, key: String) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:30:23
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn dec(&mut self, key: String) {
[INFO] [stderr]    |                       ^^^ help: if this is intentional, prefix it with an underscore: `_key`
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/graph_valid_tree_261.rs:16:9
[INFO] [stderr]    |
[INFO] [stderr] 16 |     let mut prev = -1;
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `backtrace`
[INFO] [stderr]   --> src/longest_palindrome_subsequence_516.rs:34:4
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn backtrace(string: &Vec<i32>, left: usize, right: usize, dp: &mut Vec<Vec<i32>>) -> i32 {
[INFO] [stderr]    |    ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `AllOne`
[INFO] [stderr]  --> src/all_O_one_data_structure_432.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct AllOne {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     fn new() -> Self {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `inc`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 |     fn inc(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `dec`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 |     fn dec(&mut self, key: String) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_max_key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     fn get_max_key(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `get_min_key`
[INFO] [stderr]   --> src/all_O_one_data_structure_432.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn get_min_key(&self) -> String {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: module `all_O_one_data_structure_432` should have a snake case name
[INFO] [stderr]   --> src/lib.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 | pub mod all_O_one_data_structure_432;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case (notice the capitalization): `all_o_one_data_structure_432`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `valBox` should have a snake case name
[INFO] [stderr]   --> src/kth_smallest_elements_in_a_bst_230.rs:15:14
[INFO] [stderr]    |
[INFO] [stderr] 15 |         Some(valBox) => {
[INFO] [stderr]    |              ^^^^^^ help: convert the identifier to snake case: `val_box`
[INFO] [stderr] 
[INFO] [stderr] warning: 21 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "04fd09a9535ddf9db6f107ef78063e73facf6ab9b015a11bf57e180390f52ca8"`
[INFO] running `"docker" "rm" "-f" "04fd09a9535ddf9db6f107ef78063e73facf6ab9b015a11bf57e180390f52ca8"`
[INFO] [stdout] 04fd09a9535ddf9db6f107ef78063e73facf6ab9b015a11bf57e180390f52ca8