[INFO] cloning repository https://github.com/Gearhartlove/leest
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Gearhartlove/leest" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGearhartlove%2Fleest", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGearhartlove%2Fleest'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1cd900fde7b5f32f52a0bab8140b9bb4f23f29ef
[INFO] testing Gearhartlove/leest against beta-2026-01-20 for beta-1.94-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGearhartlove%2Fleest" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Gearhartlove/leest
[INFO] finished tweaking git repo https://github.com/Gearhartlove/leest
[INFO] tweaked toml for git repo https://github.com/Gearhartlove/leest written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Gearhartlove/leest on toolchain beta-2026-01-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Gearhartlove/leest 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" "+beta-2026-01-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e01bc6770bbfabb6c74c4b9296c1a1349f8df3f3cfe8e19b8abc84582de0c274
[INFO] running `Command { std: "docker" "start" "-a" "e01bc6770bbfabb6c74c4b9296c1a1349f8df3f3cfe8e19b8abc84582de0c274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e01bc6770bbfabb6c74c4b9296c1a1349f8df3f3cfe8e19b8abc84582de0c274", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e01bc6770bbfabb6c74c4b9296c1a1349f8df3f3cfe8e19b8abc84582de0c274", kill_on_drop: false }`
[INFO] [stdout] e01bc6770bbfabb6c74c4b9296c1a1349f8df3f3cfe8e19b8abc84582de0c274
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8bd2d3d4197e29e5b09e66551cc57661bf36c2afa6455969192e680a709565b0
[INFO] running `Command { std: "docker" "start" "-a" "8bd2d3d4197e29e5b09e66551cc57661bf36c2afa6455969192e680a709565b0", kill_on_drop: false }`
[INFO] [stderr]    Compiling leest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::replace`
[INFO] [stdout]  --> src/worked_problems/shift_2d_grid.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::mem::replace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `worked_problems::baseball_game`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use worked_problems::baseball_game;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |                  let mut new_score = *record.last()? * 2;
[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: value assigned to `new_score` is never read
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:42:43
[INFO] [stdout]    |
[INFO] [stdout] 42 |                  let mut new_score: i32 = 0;
[INFO] [stdout]    |                                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/worked_problems/top_k_frequent_elements.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for i in 0..k {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[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/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let mut result_matrix = grid.clone();
[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/worked_problems/shift_2d_grid.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let mut row = return_grid.get_mut(new_row_pos).unwrap();
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result_matrix`
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let mut result_matrix = grid.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_result_matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `cal_points` is never used
[INFO] [stdout]  --> src/worked_problems/baseball_game.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn cal_points(ops: Vec<&str>) -> 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: enum `Ops` is never used
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:30:6
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum Ops {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `handle_ops` is never used
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:38:12
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Ops {
[INFO] [stdout]    | -------- associated function in this implementation
[INFO] [stdout] 38 |     pub fn handle_ops(op: Ops, record: &mut Vec<i32>) -> Option<bool> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `top_k_frequent` is never used
[INFO] [stdout]  --> src/worked_problems/top_k_frequent_elements.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn top_k_frequent(nums: Vec<i32>, k: i32) -> Vec<i32> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `shift_grid` is never used
[INFO] [stdout]  --> src/worked_problems/shift_2d_grid.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub fn shift_grid(grid: Vec<Vec<i32>>, shift: i32) -> Vec<Vec<i32>> {
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `ROWS` should have a snake case name
[INFO] [stdout]  --> src/worked_problems/shift_2d_grid.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let ROWS = return_grid.len();
[INFO] [stdout]   |         ^^^^ help: convert the identifier to snake case: `rows`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `COLS` should have a snake case name
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let COLS = return_grid[0].len();
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `cols`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SIZE` should have a snake case name
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let SIZE = ROWS * COLS;
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let _ = std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "8bd2d3d4197e29e5b09e66551cc57661bf36c2afa6455969192e680a709565b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bd2d3d4197e29e5b09e66551cc57661bf36c2afa6455969192e680a709565b0", kill_on_drop: false }`
[INFO] [stdout] 8bd2d3d4197e29e5b09e66551cc57661bf36c2afa6455969192e680a709565b0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba181ec32e7de203fa218584b8834138cdc56f628869973c1bfbf270f7434523
[INFO] running `Command { std: "docker" "start" "-a" "ba181ec32e7de203fa218584b8834138cdc56f628869973c1bfbf270f7434523", kill_on_drop: false }`
[INFO] [stderr]    Compiling leest v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::replace`
[INFO] [stdout]  --> src/worked_problems/shift_2d_grid.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::mem::replace;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `worked_problems::baseball_game`
[INFO] [stdout]  --> src/main.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use worked_problems::baseball_game;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:51:22
[INFO] [stdout]    |
[INFO] [stdout] 51 |                  let mut new_score = *record.last()? * 2;
[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: value assigned to `new_score` is never read
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:42:43
[INFO] [stdout]    |
[INFO] [stdout] 42 |                  let mut new_score: i32 = 0;
[INFO] [stdout]    |                                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/worked_problems/top_k_frequent_elements.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for i in 0..k {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[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/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let mut result_matrix = grid.clone();
[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/worked_problems/shift_2d_grid.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let mut row = return_grid.get_mut(new_row_pos).unwrap();
[INFO] [stdout]    |                 ----^^^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result_matrix`
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let mut result_matrix = grid.clone();
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_result_matrix`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `INTEGER` is never constructed
[INFO] [stdout]   --> src/worked_problems/baseball_game.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 30 | enum Ops {
[INFO] [stdout]    |      --- variant in this enum
[INFO] [stdout] 31 |     INTEGER,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `ROWS` should have a snake case name
[INFO] [stdout]  --> src/worked_problems/shift_2d_grid.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let ROWS = return_grid.len();
[INFO] [stdout]   |         ^^^^ help: convert the identifier to snake case: `rows`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `COLS` should have a snake case name
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let COLS = return_grid[0].len();
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `cols`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `SIZE` should have a snake case name
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let SIZE = ROWS * COLS;
[INFO] [stdout]    |         ^^^^ help: convert the identifier to snake case: `size`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/worked_problems/shift_2d_grid.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |             std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let _ = std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stdout]    |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `Command { std: "docker" "inspect" "ba181ec32e7de203fa218584b8834138cdc56f628869973c1bfbf270f7434523", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba181ec32e7de203fa218584b8834138cdc56f628869973c1bfbf270f7434523", kill_on_drop: false }`
[INFO] [stdout] ba181ec32e7de203fa218584b8834138cdc56f628869973c1bfbf270f7434523
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-01-20" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 911e75d665b4ae4d115399da1b7084d768119844d635f438a496cfa6f094158f
[INFO] running `Command { std: "docker" "start" "-a" "911e75d665b4ae4d115399da1b7084d768119844d635f438a496cfa6f094158f", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::mem::replace`
[INFO] [stderr]  --> src/worked_problems/shift_2d_grid.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use std::mem::replace;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `worked_problems::baseball_game`
[INFO] [stderr]  --> src/main.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use worked_problems::baseball_game;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/worked_problems/baseball_game.rs:51:22
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] running 5 tests
[INFO] [stderr] 51 |                  let mut new_score = *record.last()? * 2;
[INFO] [stderr]    |                      ----^^^^^^^^^
[INFO] [stderr]    |                      |
[INFO] [stderr]    |                      help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `new_score` is never read
[INFO] [stderr]   --> src/worked_problems/baseball_game.rs:42:43
[INFO] [stderr]    |
[INFO] [stderr] 42 |                  let mut new_score: i32 = 0;
[INFO] [stderr]    |                                           ^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]   --> src/worked_problems/top_k_frequent_elements.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for i in 0..k {
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut result_matrix = grid.clone();
[INFO] [stderr]    |             ----^^^^^^^^^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |             let mut row = return_grid.get_mut(new_row_pos).unwrap();
[INFO] [stderr]    |                 ----^^^
[INFO] [stderr]    |                 |
[INFO] [stderr]    |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `result_matrix`
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:34:13
[INFO] [stderr]    |
[INFO] [stderr] 34 |         let mut result_matrix = grid.clone();
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_result_matrix`
[INFO] [stdout] test worked_problems::baseball_game::tests::baseball_works ... ok
[INFO] [stderr] 
[INFO] [stderr] warning: variant `INTEGER` is never constructed
[INFO] [stderr]   --> src/worked_problems/baseball_game.rs:31:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | enum Ops {
[INFO] [stderr]    |      --- variant in this enum
[INFO] [stderr] 31 |     INTEGER,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `ROWS` should have a snake case name
[INFO] [stderr]  --> src/worked_problems/shift_2d_grid.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let ROWS = return_grid.len();
[INFO] [stderr]   |         ^^^^ help: convert the identifier to snake case: `rows`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `COLS` should have a snake case name
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:10:9
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let COLS = return_grid[0].len();
[INFO] [stderr]    |         ^^^^ help: convert the identifier to snake case: `cols`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `SIZE` should have a snake case name
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let SIZE = ROWS * COLS;
[INFO] [stdout] test worked_problems::shift_2d_grid::tests::shift_k_works ... ok
[INFO] [stderr]    |         ^^^^ help: convert the identifier to snake case: `size`
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/worked_problems/shift_2d_grid.rs:40:13
[INFO] [stderr]    |
[INFO] [stderr] 40 |             std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 40 |             let _ = std::mem::replace(&mut row[adjusted_new_index], **k);
[INFO] [stderr]    |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `leest` (bin "leest" test) generated 13 warnings (run `cargo fix --bin "leest" -p leest --tests` to apply 7 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/leest-622f46ebe41281ea)
[INFO] [stdout] test worked_problems::shift_2d_grid::tests::shift_nxn_works ... ok
[INFO] [stderr] error: test failed, to rerun pass `--bin leest`
[INFO] [stdout] test worked_problems::shift_2d_grid::tests::shift_mxn_works ... ok
[INFO] [stdout] test worked_problems::top_k_frequent_elements::tests::working ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- worked_problems::top_k_frequent_elements::tests::working stdout ----
[INFO] [stdout] [2, 1]
[INFO] [stdout] 
[INFO] [stdout] thread 'worked_problems::top_k_frequent_elements::tests::working' (28) panicked at src/worked_problems/top_k_frequent_elements.rs:43:9:
[INFO] [stdout] assertion `left == right` failed
[INFO] [stdout]   left: [1, 2]
[INFO] [stdout]  right: [2, 1]
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x6236d5c4a002 - std::backtrace_rs::backtrace::libunwind::trace::hf0bd46b30bc61685
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/libunwind.rs:117:9
[INFO] [stdout]    1:     0x6236d5c4a002 - std::backtrace_rs::backtrace::trace_unsynchronized::h1d1fbb72ad89d7b7
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/../../backtrace/src/backtrace/mod.rs:66:14
[INFO] [stdout]    2:     0x6236d5c4a002 - std::sys::backtrace::_print_fmt::he38b6f68ca847f47
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:74:9
[INFO] [stdout]    3:     0x6236d5c4a002 - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hb7e843cde1bc81a3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:44:26
[INFO] [stdout]    4:     0x6236d5c5a1ba - core::fmt::rt::Argument::fmt::hc1dd77ac64f2688c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/fmt/rt.rs:152:76
[INFO] [stdout]    5:     0x6236d5c5a1ba - core::fmt::write::h952c506e2dbe9cff
[INFO] [stdout]    6:     0x6236d5c18f86 - std::io::default_write_fmt::hd23bd8145c03a23a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:639:11
[INFO] [stdout]    7:     0x6236d5c18f86 - std::io::Write::write_fmt::hdd3314a2bd8a34bd
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/io/mod.rs:1994:13
[INFO] [stdout]    8:     0x6236d5c294e9 - std::sys::backtrace::BacktraceLock::print::h1079b82381c2c252
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:47:9
[INFO] [stdout]    9:     0x6236d5c294e9 - std::panicking::default_hook::{{closure}}::h85cb76b8462c00f2
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:292:27
[INFO] [stdout]   10:     0x6236d5c29381 - std::panicking::default_hook::h0134d220cc034c02
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:316:9
[INFO] [stdout]   11:     0x6236d5beda2e - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hb2e68dca3970e3ca
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   12:     0x6236d5beda2e - test::test_main_with_exit_callback::{{closure}}::ha7ec2063a2565ec3
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:145:21
[INFO] [stdout]   13:     0x6236d5c29762 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::haebee478d0f56cf4
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2220:9
[INFO] [stdout]   14:     0x6236d5c29762 - std::panicking::panic_with_hook::h8119b6db1fef734f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:833:13
[INFO] [stdout]   15:     0x6236d5c295a8 - std::panicking::panic_handler::{{closure}}::h24f5360b91482c0e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:698:13
[INFO] [stdout]   16:     0x6236d5c24b39 - std::sys::backtrace::__rust_end_short_backtrace::h4e60c5cbd1bd0108
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:182:18
[INFO] [stdout]   17:     0x6236d5c0db7d - __rustc[e4c6931bd8050421]::rust_begin_unwind
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:689:5
[INFO] [stdout]   18:     0x6236d5c618bc - core::panicking::panic_fmt::hb1614a3ff6840071
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:80:14
[INFO] [stdout]   19:     0x6236d5c61773 - core::panicking::assert_failed_inner::h5aabe811ef142622
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:439:17
[INFO] [stdout]   20:     0x6236d5bca77d - core::panicking::assert_failed::h23d57d4067639789
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panicking.rs:394:5
[INFO] [stdout]   21:     0x6236d5bcb6a8 - leest::worked_problems::top_k_frequent_elements::tests::working::hcc480608d3d7d898
[INFO] [stdout]                                at /opt/rustwide/workdir/src/worked_problems/top_k_frequent_elements.rs:43:9
[INFO] [stdout]   22:     0x6236d5bcb917 - leest::worked_problems::top_k_frequent_elements::tests::working::{{closure}}::h630e0db3f60accce
[INFO] [stdout]                                at /opt/rustwide/workdir/src/worked_problems/top_k_frequent_elements.rs:42:17
[INFO] [stdout]   23:     0x6236d5bc9a76 - core::ops::function::FnOnce::call_once::hb3dd206e498b0c4b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   24:     0x6236d5bed82b - core::ops::function::FnOnce::call_once::hefaf63600cd43d2a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   25:     0x6236d5bed82b - test::__rust_begin_short_backtrace::he30322a73a0e9ea6
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:663:18
[INFO] [stdout]   26:     0x6236d5c011fa - test::run_test_in_process::{{closure}}::hdea3ab8d0243ef36
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:74
[INFO] [stdout]   27:     0x6236d5c011fa - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h66d192f42498ffce
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   28:     0x6236d5c011fa - std::panicking::catch_unwind::do_call::h822e18e8d3a6bb65
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   29:     0x6236d5c011fa - std::panicking::catch_unwind::h54b1de7ceab578bf
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   30:     0x6236d5c011fa - std::panic::catch_unwind::h60c29b7a9d0246b1
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   31:     0x6236d5c011fa - test::run_test_in_process::h6099b5f871379b13
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:686:27
[INFO] [stdout]   32:     0x6236d5c011fa - test::run_test::{{closure}}::h926ce0a38281a4c8
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:607:43
[INFO] [stdout]   33:     0x6236d5bdb654 - test::run_test::{{closure}}::h508de21a9afc7140
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/test/src/lib.rs:637:41
[INFO] [stdout]   34:     0x6236d5bdb654 - std::sys::backtrace::__rust_begin_short_backtrace::h6e2f5c39ca00735a
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/backtrace.rs:166:18
[INFO] [stdout]   35:     0x6236d5bdef12 - std::thread::lifecycle::spawn_unchecked::{{closure}}::{{closure}}::h133e44f0e5802c14
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:91:13
[INFO] [stdout]   36:     0x6236d5bdef12 - <core::panic::unwind_safe::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h4718c1285283955c
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/panic/unwind_safe.rs:274:9
[INFO] [stdout]   37:     0x6236d5bdef12 - std::panicking::catch_unwind::do_call::h0bba3937b4892238
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:581:40
[INFO] [stdout]   38:     0x6236d5bdef12 - std::panicking::catch_unwind::h5b31cab5fb8c5d7f
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panicking.rs:544:19
[INFO] [stdout]   39:     0x6236d5bdef12 - std::panic::catch_unwind::hb2fa05d52ed0124e
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/panic.rs:359:14
[INFO] [stdout]   40:     0x6236d5bdef12 - std::thread::lifecycle::spawn_unchecked::{{closure}}::hf401cf5ff501bd29
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/thread/lifecycle.rs:89:26
[INFO] [stdout]   41:     0x6236d5bdef12 - core::ops::function::FnOnce::call_once{{vtable.shim}}::h160022e94ce3b0bb
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/core/src/ops/function.rs:250:5
[INFO] [stdout]   42:     0x6236d5c1fdcf - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hf234e0d1d1d272ba
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/alloc/src/boxed.rs:2206:9
[INFO] [stdout]   43:     0x6236d5c1fdcf - std::sys::thread::unix::Thread::new::thread_start::h106a295241840d3b
[INFO] [stdout]                                at /rustc/9b1f8ff42d110b0ca138116745be921df5dc97e7/library/std/src/sys/thread/unix.rs:127:17
[INFO] [stdout]   44:     0x7589c0344aa4 - <unknown>
[INFO] [stdout]   45:     0x7589c03d1a64 - clone
[INFO] [stdout]   46:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     worked_problems::top_k_frequent_elements::tests::working
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 4 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "911e75d665b4ae4d115399da1b7084d768119844d635f438a496cfa6f094158f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "911e75d665b4ae4d115399da1b7084d768119844d635f438a496cfa6f094158f", kill_on_drop: false }`
[INFO] [stdout] 911e75d665b4ae4d115399da1b7084d768119844d635f438a496cfa6f094158f
