[INFO] cloning repository https://github.com/theroguevigilante/competitive-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/theroguevigilante/competitive-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheroguevigilante%2Fcompetitive-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheroguevigilante%2Fcompetitive-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4a222ee45d39c75a622bdfd159adab01d6b68bd9
[INFO] checking theroguevigilante/competitive-rust against 3154cc1a3e6424e44f438a95007d043ed5ceaaf6+rustflags=-Znext-solver=coherence for pr-133502-30
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftheroguevigilante%2Fcompetitive-rust" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/theroguevigilante/competitive-rust
[INFO] finished tweaking git repo https://github.com/theroguevigilante/competitive-rust
[INFO] tweaked toml for git repo https://github.com/theroguevigilante/competitive-rust written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/theroguevigilante/competitive-rust on toolchain 3154cc1a3e6424e44f438a95007d043ed5ceaaf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/theroguevigilante/competitive-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" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282
[INFO] running `Command { std: "docker" "start" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Znext-solver=coherence" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282" "/opt/rustwide/cargo-home/bin/cargo" "+3154cc1a3e6424e44f438a95007d043ed5ceaaf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking competitive-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]  --> src/bin/binary-search.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn binary_search(arr: &[i32], target: i32) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/evaluation-of-expressions.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Operator(char),
[INFO] [stdout]   |     -------- ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     Operator(char),
[INFO] [stdout] 4 +     Operator(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/bin/evaluation-of-expressions.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Number(i32),
[INFO] [stdout]   |     ------ ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Token` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Number(i32),
[INFO] [stdout] 5 +     Number(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdin`
[INFO] [stdout]   --> src/bin/easytoken.rs:22:10
[INFO] [stdout]    |
[INFO] [stdout] 22 | fn solve(stdin: &mut Scanner) {}
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/easytoken.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut stdin = Scanner::new(&input);
[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: unused variable: `stdin`
[INFO] [stdout]   --> src/bin/easytoken.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let mut stdin = Scanner::new(&input);
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cin`
[INFO] [stdout]   --> src/bin/fastio.rs:41:10
[INFO] [stdout]    |
[INFO] [stdout] 41 | fn solve(cin: &mut Scanner) {
[INFO] [stdout]    |          ^^^ help: if this is intentional, prefix it with an underscore: `_cin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/bin/fastio.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let t: u32 = cin.next(); 
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/accounts-merge.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let mut parent = (0..n).collect();
[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/bin/accounts-merge.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 13 |         let mut size = vec![1; n];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DisjointSet` is never constructed
[INFO] [stdout]  --> src/bin/accounts-merge.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct DisjointSet {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Solution` is never constructed
[INFO] [stdout]  --> src/bin/accounts-merge.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct Solution;
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `find`, and `union` are never used
[INFO] [stdout]   --> src/bin/accounts-merge.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl DisjointSet {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 11 |     fn new(n: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn find(&mut self, mut i: usize) -> usize {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |     fn union(&mut self, i: usize, j: usize) -> bool {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `accounts_merge` is never used
[INFO] [stdout]   --> src/bin/accounts-merge.rs:50:12
[INFO] [stdout]    |
[INFO] [stdout] 49 | impl Solution {
[INFO] [stdout]    | ------------- associated function in this implementation
[INFO] [stdout] 50 |     pub fn accounts_merge(accounts: Vec<Vec<String>>) -> Vec<Vec<String>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdin`
[INFO] [stdout]   --> src/bin/deletion-sort.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn solve(stdin: &mut Scanner) {
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/bin/dsu.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |         let mut parent = (0..n).collect();
[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/bin/dsu.rs:10:13
[INFO] [stdout]    |
[INFO] [stdout] 10 |         let mut size = vec![1; n];
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `input`
[INFO] [stdout]   --> src/bin/template.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 | fn solve<R: BufRead>(input: &mut Scanner<R>){
[INFO] [stdout]    |                      ^^^^^ help: if this is intentional, prefix it with an underscore: `_input`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0061]: this method takes 0 arguments but 1 argument was supplied
[INFO] [stdout]   --> src/bin/specialty-string.rs:29:52
[INFO] [stdout]    |
[INFO] [stdout] 29 |             if nc == 1 && s.chars().nth(index + 1).unwrap_or_default('*') != i {
[INFO] [stdout]    |                                                    ^^^^^^^^^^^^^^^^^ --- unexpected argument of type `char`
[INFO] [stdout]    |
[INFO] [stdout] note: method defined here
[INFO] [stdout]   --> /rustc/3154cc1a3e6424e44f438a95007d043ed5ceaaf6/library/core/src/option.rs:1093:17
[INFO] [stdout] help: remove the extra argument
[INFO] [stdout]    |
[INFO] [stdout] 29 -             if nc == 1 && s.chars().nth(index + 1).unwrap_or_default('*') != i {
[INFO] [stdout] 29 +             if nc == 1 && s.chars().nth(index + 1).unwrap_or_default() != i {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0061`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `competitive-rust` (bin "specialty-string") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function `binary_search` is never used
[INFO] [stdout]  --> src/bin/binary-search.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn binary_search(arr: &[i32], target: i32) -> Option<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `stdin`
[INFO] [stdout]   --> src/bin/deletion-sort.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn solve(stdin: &mut Scanner) {
[INFO] [stdout]    |          ^^^^^ help: if this is intentional, prefix it with an underscore: `_stdin`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282", kill_on_drop: false }`
[INFO] [stdout] cc6f7b739889a7a4d871666c91cfd7d40027a6ef2051778ffb40137dbfbf3282
