[INFO] cloning repository https://github.com/shade/rustoku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/shade/rustoku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshade%2Frustoku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshade%2Frustoku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1490b369ec54974589095e7767613c3aa55960a9
[INFO] testing shade/rustoku against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fshade%2Frustoku" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/shade/rustoku on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/shade/rustoku
[INFO] finished tweaking git repo https://github.com/shade/rustoku
[INFO] tweaked toml for git repo https://github.com/shade/rustoku written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/shade/rustoku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9b2efc8ae8c6cda91b79be52722da0287032bf381cfa1c1a194fbb8cc85fdcf9
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9b2efc8ae8c6cda91b79be52722da0287032bf381cfa1c1a194fbb8cc85fdcf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9b2efc8ae8c6cda91b79be52722da0287032bf381cfa1c1a194fbb8cc85fdcf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b2efc8ae8c6cda91b79be52722da0287032bf381cfa1c1a194fbb8cc85fdcf9", kill_on_drop: false }`
[INFO] [stdout] 9b2efc8ae8c6cda91b79be52722da0287032bf381cfa1c1a194fbb8cc85fdcf9
[INFO] running `Command { std: "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=warn" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec7508aeac70da7c0a2778767c9cc57e1c052b307a330d36b7238ec94e22f6ef
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ec7508aeac70da7c0a2778767c9cc57e1c052b307a330d36b7238ec94e22f6ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.19
[INFO] [stderr]    Compiling time v0.1.35
[INFO] [stderr]    Compiling sandbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(type_ascription)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use test::Bencher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Arc`, `Mutex`
[INFO] [stdout]  --> src/main.rs:9:17
[INFO] [stdout]   |
[INFO] [stdout] 9 | use std::sync::{Arc, Mutex};
[INFO] [stdout]   |                 ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std::collections::HashMap;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]   --> src/main.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use std::str;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::slice`
[INFO] [stdout]   --> src/main.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | use std::slice;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cmp`
[INFO] [stdout]   --> src/main.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | use std::cmp;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:233:23
[INFO] [stdout]     |
[INFO] [stdout] 233 |           let val_y = (WON[self.verti_y[i] as usize] | WON[self.horiz_y[i] as usize] | WON[self.diagr_y[i] as usize] | WON[self.diagl_y[i] as usize]);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:234:23
[INFO] [stdout]     |
[INFO] [stdout] 234 |           let val_o = (WON[self.verti_o[i] as usize] | WON[self.horiz_o[i] as usize] | WON[self.diagr_o[i] as usize] | WON[self.diagl_o[i] as usize]);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:242:23
[INFO] [stdout]     |
[INFO] [stdout] 242 |           let val_y = (WON[self.verti_y[i] as usize] | WON[self.horiz_y[i] as usize] | WON[self.diagr_y[i] as usize] | WON[self.diagl_y[i] as usize]);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:243:23
[INFO] [stdout]     |
[INFO] [stdout] 243 |           let val_o = (WON[self.verti_o[i] as usize] | WON[self.horiz_o[i] as usize] | WON[self.diagr_o[i] as usize] | WON[self.diagl_o[i] as usize]);
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:414:18
[INFO] [stdout]     |
[INFO] [stdout] 414 |         cur.1 += (_NEG * MAX_VALS[mov.1 as usize])
[INFO] [stdout]     |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:464:107
[INFO] [stdout]     |
[INFO] [stdout] 464 |   pub unsafe fn place_horiz_you (&mut self, place: usize) {let mov = HORIZ[place]; self.horiz_y[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                           ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:465:107
[INFO] [stdout]     |
[INFO] [stdout] 465 |   pub unsafe fn place_verti_you (&mut self, place: usize) {let mov = VERTI[place]; self.verti_y[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                           ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:466:108
[INFO] [stdout]     |
[INFO] [stdout] 466 |   pub unsafe fn remove_horiz_you (&mut self, place: usize) {let mov = HORIZ[place]; self.horiz_y[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                            ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:467:108
[INFO] [stdout]     |
[INFO] [stdout] 467 |   pub unsafe fn remove_verti_you (&mut self, place: usize) {let mov = VERTI[place]; self.verti_y[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                            ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:468:132
[INFO] [stdout]     |
[INFO] [stdout] 468 |   pub unsafe fn place_diagl_you (&mut self, place: usize) {let mov = DIAGL[place]; if mov.0 == NO {return;} self.diagl_y[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                    ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:469:132
[INFO] [stdout]     |
[INFO] [stdout] 469 |   pub unsafe fn place_diagr_you (&mut self, place: usize) {let mov = DIAGR[place]; if mov.0 == NO {return;} self.diagr_y[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                    ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:470:133
[INFO] [stdout]     |
[INFO] [stdout] 470 |   pub unsafe fn remove_diagl_you (&mut self, place: usize) {let mov = DIAGL[place]; if mov.0 == NO {return;} self.diagl_y[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:471:133
[INFO] [stdout]     |
[INFO] [stdout] 471 |   pub unsafe fn remove_diagr_you (&mut self, place: usize) {let mov = DIAGR[place]; if mov.0 == NO {return;} self.diagr_y[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:473:107
[INFO] [stdout]     |
[INFO] [stdout] 473 |   pub unsafe fn place_horiz_opp (&mut self, place: usize) {let mov = HORIZ[place]; self.horiz_o[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                           ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:474:107
[INFO] [stdout]     |
[INFO] [stdout] 474 |   pub unsafe fn place_verti_opp (&mut self, place: usize) {let mov = VERTI[place]; self.verti_o[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                           ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:475:108
[INFO] [stdout]     |
[INFO] [stdout] 475 |   pub unsafe fn remove_horiz_opp (&mut self, place: usize) {let mov = HORIZ[place]; self.horiz_o[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                            ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:476:108
[INFO] [stdout]     |
[INFO] [stdout] 476 |   pub unsafe fn remove_verti_opp (&mut self, place: usize) {let mov = VERTI[place]; self.verti_o[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                            ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:477:132
[INFO] [stdout]     |
[INFO] [stdout] 477 |   pub unsafe fn place_diagl_opp (&mut self, place: usize) {let mov = DIAGL[place]; if mov.0 == NO {return;} self.diagl_o[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                    ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:478:132
[INFO] [stdout]     |
[INFO] [stdout] 478 |   pub unsafe fn place_diagr_opp (&mut self, place: usize) {let mov = DIAGR[place]; if mov.0 == NO {return;} self.diagr_o[mov.0] |= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                    ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:479:133
[INFO] [stdout]     |
[INFO] [stdout] 479 |   pub unsafe fn remove_diagl_opp (&mut self, place: usize) {let mov = DIAGL[place]; if mov.0 == NO {return;} self.diagl_o[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around assigned value
[INFO] [stdout]    --> src/board.rs:480:133
[INFO] [stdout]     |
[INFO] [stdout] 480 |   pub unsafe fn remove_diagr_opp (&mut self, place: usize) {let mov = DIAGR[place]; if mov.0 == NO {return;} self.diagr_o[mov.0] ^= (1 << mov.1);}
[INFO] [stdout]     |                                                                                                                                     ^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::boxed::Box`
[INFO] [stdout]  --> src/build.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::boxed::Box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fs::File`
[INFO] [stdout]  --> src/build.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::File;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Write`
[INFO] [stdout]  --> src/build.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::io::Write;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::Read`
[INFO] [stdout]  --> src/build.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::io::Read;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `BufReader`, `self`
[INFO] [stdout]  --> src/build.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::io::{self, BufReader};
[INFO] [stdout]   |               ^^^^  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::io::prelude::*`
[INFO] [stdout]  --> src/build.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::io::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::mem`
[INFO] [stdout]   --> src/build.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::mem;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std`
[INFO] [stdout]   --> src/build.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use std;
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `test::Bencher`
[INFO] [stdout]  --> src/tests.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use test::Bencher;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashMap`
[INFO] [stdout]  --> src/tests.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::collections::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::collections::HashSet`
[INFO] [stdout]  --> src/tests.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | use std::collections::HashSet;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str`
[INFO] [stdout]  --> src/tests.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::str;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::string::String`
[INFO] [stdout]  --> src/tests.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::string::String;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 40 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sandbox`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "ec7508aeac70da7c0a2778767c9cc57e1c052b307a330d36b7238ec94e22f6ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec7508aeac70da7c0a2778767c9cc57e1c052b307a330d36b7238ec94e22f6ef", kill_on_drop: false }`
[INFO] [stdout] ec7508aeac70da7c0a2778767c9cc57e1c052b307a330d36b7238ec94e22f6ef