[INFO] cloning repository https://github.com/simon-auch/projecteuler [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simon-auch/projecteuler" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-auch%2Fprojecteuler", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-auch%2Fprojecteuler'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 0518e55423a7defe009e8bfaf07cdbd08d9f47f8 [INFO] checking simon-auch/projecteuler against try#a7a572ce3edd6d476191fbfe92c9c1986e009b34 for pr-87190-3 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-auch%2Fprojecteuler" "/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/simon-auch/projecteuler on toolchain a7a572ce3edd6d476191fbfe92c9c1986e009b34 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/simon-auch/projecteuler [INFO] finished tweaking git repo https://github.com/simon-auch/projecteuler [INFO] tweaked toml for git repo https://github.com/simon-auch/projecteuler written to /workspace/builds/worker-1/source/Cargo.toml [INFO] crate git repo https://github.com/simon-auch/projecteuler already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "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/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f603ee1a54f767af81949b4e676ebf91331ec162b6435308c93b9f7ccddc1896 [INFO] running `Command { std: "docker" "start" "-a" "f603ee1a54f767af81949b4e676ebf91331ec162b6435308c93b9f7ccddc1896", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f603ee1a54f767af81949b4e676ebf91331ec162b6435308c93b9f7ccddc1896", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f603ee1a54f767af81949b4e676ebf91331ec162b6435308c93b9f7ccddc1896", kill_on_drop: false }` [INFO] [stdout] f603ee1a54f767af81949b4e676ebf91331ec162b6435308c93b9f7ccddc1896 [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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+a7a572ce3edd6d476191fbfe92c9c1986e009b34" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 349b23088252d128f09c5fa26b0c442c62cc5ec2398fd7f4204e62ecee42aa01 [INFO] running `Command { std: "docker" "start" "-a" "349b23088252d128f09c5fa26b0c442c62cc5ec2398fd7f4204e62ecee42aa01", kill_on_drop: false }` [INFO] [stderr] Copying to /tmp/fixit [INFO] [stderr] Running `cargo fix --edition` [INFO] [stderr] Compiling autocfg v1.0.0 [INFO] [stderr] Checking gcd v2.0.1 [INFO] [stderr] Compiling num-traits v0.2.12 [INFO] [stderr] Compiling num-integer v0.1.43 [INFO] [stderr] Compiling num-bigint v0.3.0 [INFO] [stderr] Compiling num-iter v0.1.41 [INFO] [stderr] Compiling num-rational v0.3.0 [INFO] [stderr] Checking num-complex v0.3.0 [INFO] [stderr] Checking num v0.3.0 [INFO] [stderr] Checking projecteuler v0.1.0 (/tmp/fixit) [INFO] [stderr] Migrating src/lib.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0684.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0097.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0026.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0067.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0051.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0049.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0039.rs from 2018 edition to 2021 [INFO] [stderr] Migrating src/bin/problem_0022.rs from 2018 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src/bin/problem_0017.rs (1 fix) [INFO] [stderr] Fixed src/bin/problem_0599.rs (1 fix) [INFO] [stdout] warning: value assigned to `cube` is never read [INFO] [stdout] --> src/bin/problem_0599.rs:296:13 [INFO] [stdout] | [INFO] [stdout] 296 | cube >>= 5; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `check_cubelet_colorings` [INFO] [stdout] --> src/bin/problem_0599.rs:141:4 [INFO] [stdout] | [INFO] [stdout] 141 | fn check_cubelet_colorings(c: u8) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `dbg_cube` [INFO] [stdout] --> src/bin/problem_0599.rs:331:4 [INFO] [stdout] | [INFO] [stdout] 331 | fn dbg_cube(cube: &[u8; 24]) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `F` [INFO] [stdout] --> src/bin/problem_0599.rs:370:5 [INFO] [stdout] | [INFO] [stdout] 370 | F = 0, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `U` [INFO] [stdout] --> src/bin/problem_0599.rs:371:5 [INFO] [stdout] | [INFO] [stdout] 371 | U = 1, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `R` [INFO] [stdout] --> src/bin/problem_0599.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 372 | R = 2, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `D` [INFO] [stdout] --> src/bin/problem_0599.rs:373:5 [INFO] [stdout] | [INFO] [stdout] 373 | D = 3, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `L` [INFO] [stdout] --> src/bin/problem_0599.rs:374:5 [INFO] [stdout] | [INFO] [stdout] 374 | L = 4, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `B` [INFO] [stdout] --> src/bin/problem_0599.rs:375:5 [INFO] [stdout] | [INFO] [stdout] 375 | B = 5, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Rotation` [INFO] [stdout] --> src/bin/problem_0599.rs:377:6 [INFO] [stdout] | [INFO] [stdout] 377 | enum Rotation { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Move` [INFO] [stdout] --> src/bin/problem_0599.rs:382:8 [INFO] [stdout] | [INFO] [stdout] 382 | struct Move { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `as_usize` [INFO] [stdout] --> src/bin/problem_0599.rs:389:8 [INFO] [stdout] | [INFO] [stdout] 389 | fn as_usize(self) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `from_usize` [INFO] [stdout] --> src/bin/problem_0599.rs:392:8 [INFO] [stdout] | [INFO] [stdout] 392 | fn from_usize(n: usize) -> Self { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> src/bin/problem_0599.rs:407:5 [INFO] [stdout] | [INFO] [stdout] 407 | data: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `side_length` [INFO] [stdout] --> src/bin/problem_0599.rs:408:5 [INFO] [stdout] | [INFO] [stdout] 408 | side_length: u8, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static is never used: `ID_2x2` [INFO] [stdout] --> src/bin/problem_0599.rs:412:1 [INFO] [stdout] | [INFO] [stdout] 412 | / static ID_2x2: &[u8;4*6] = &[ [INFO] [stdout] 413 | | 00,01, [INFO] [stdout] 414 | | 02,03, [INFO] [stdout] 415 | | 04,05,06,07,08,09,10,11, [INFO] [stdout] ... | [INFO] [stdout] 418 | | 22,23, [INFO] [stdout] 419 | | ]; [INFO] [stdout] | |__^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static is never used: `MOVES_2x2` [INFO] [stdout] --> src/bin/problem_0599.rs:421:1 [INFO] [stdout] | [INFO] [stdout] 421 | / static MOVES_2x2: &[[u8;4*6];3] = &[ [INFO] [stdout] 422 | | [//Right, Clockwise [INFO] [stdout] 423 | | 00,07, [INFO] [stdout] 424 | | 02,15, [INFO] [stdout] ... | [INFO] [stdout] 445 | | ], [INFO] [stdout] 446 | | ]; [INFO] [stdout] | |__^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_identity_permutation` [INFO] [stdout] --> src/bin/problem_0599.rs:449:8 [INFO] [stdout] | [INFO] [stdout] 449 | fn get_identity_permutation(n: u8) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_all_moves` [INFO] [stdout] --> src/bin/problem_0599.rs:521:8 [INFO] [stdout] | [INFO] [stdout] 521 | fn get_all_moves(n: u8) -> Vec> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static variable `ID_2x2` should have an upper case name [INFO] [stdout] --> src/bin/problem_0599.rs:412:8 [INFO] [stdout] | [INFO] [stdout] 412 | static ID_2x2: &[u8;4*6] = &[ [INFO] [stdout] | ^^^^^^ help: convert the identifier to upper case (notice the capitalization): `ID_2X2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_upper_case_globals)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static variable `MOVES_2x2` should have an upper case name [INFO] [stdout] --> src/bin/problem_0599.rs:421:8 [INFO] [stdout] | [INFO] [stdout] 421 | static MOVES_2x2: &[[u8;4*6];3] = &[ [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper case (notice the capitalization): `MOVES_2X2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 21 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature 'bench_black_box' [INFO] [stdout] --> src/bin/problem_0071.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | core::hint::black_box(solve(1_000_000)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #64102 for more information [INFO] [stdout] = help: add `#![feature(bench_black_box)]` to the crate attributes to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] error: could not compile `projecteuler` due to 2 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] warning: value assigned to `cube` is never read [INFO] [stdout] --> src/bin/problem_0599.rs:296:13 [INFO] [stdout] | [INFO] [stdout] 296 | cube >>= 5; [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_assignments)]` on by default [INFO] [stdout] = help: maybe it is overwritten before being read? [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `check_cubelet_colorings` [INFO] [stdout] --> src/bin/problem_0599.rs:141:4 [INFO] [stdout] | [INFO] [stdout] 141 | fn check_cubelet_colorings(c: u8) -> usize { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `dbg_cube` [INFO] [stdout] --> src/bin/problem_0599.rs:331:4 [INFO] [stdout] | [INFO] [stdout] 331 | fn dbg_cube(cube: &[u8; 24]) { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `F` [INFO] [stdout] --> src/bin/problem_0599.rs:370:5 [INFO] [stdout] | [INFO] [stdout] 370 | F = 0, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `U` [INFO] [stdout] --> src/bin/problem_0599.rs:371:5 [INFO] [stdout] | [INFO] [stdout] 371 | U = 1, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `R` [INFO] [stdout] --> src/bin/problem_0599.rs:372:5 [INFO] [stdout] | [INFO] [stdout] 372 | R = 2, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `D` [INFO] [stdout] --> src/bin/problem_0599.rs:373:5 [INFO] [stdout] | [INFO] [stdout] 373 | D = 3, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `L` [INFO] [stdout] --> src/bin/problem_0599.rs:374:5 [INFO] [stdout] | [INFO] [stdout] 374 | L = 4, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant is never constructed: `B` [INFO] [stdout] --> src/bin/problem_0599.rs:375:5 [INFO] [stdout] | [INFO] [stdout] 375 | B = 5, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: enum is never used: `Rotation` [INFO] [stdout] --> src/bin/problem_0599.rs:377:6 [INFO] [stdout] | [INFO] [stdout] 377 | enum Rotation { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct is never constructed: `Move` [INFO] [stdout] --> src/bin/problem_0599.rs:382:8 [INFO] [stdout] | [INFO] [stdout] 382 | struct Move { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `as_usize` [INFO] [stdout] --> src/bin/problem_0599.rs:389:8 [INFO] [stdout] | [INFO] [stdout] 389 | fn as_usize(self) -> usize { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `from_usize` [INFO] [stdout] --> src/bin/problem_0599.rs:392:8 [INFO] [stdout] | [INFO] [stdout] 392 | fn from_usize(n: usize) -> Self { [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `data` [INFO] [stdout] --> src/bin/problem_0599.rs:407:5 [INFO] [stdout] | [INFO] [stdout] 407 | data: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `side_length` [INFO] [stdout] --> src/bin/problem_0599.rs:408:5 [INFO] [stdout] | [INFO] [stdout] 408 | side_length: u8, [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static is never used: `ID_2x2` [INFO] [stdout] --> src/bin/problem_0599.rs:412:1 [INFO] [stdout] | [INFO] [stdout] 412 | / static ID_2x2: &[u8;4*6] = &[ [INFO] [stdout] 413 | | 00,01, [INFO] [stdout] 414 | | 02,03, [INFO] [stdout] 415 | | 04,05,06,07,08,09,10,11, [INFO] [stdout] ... | [INFO] [stdout] 418 | | 22,23, [INFO] [stdout] 419 | | ]; [INFO] [stdout] | |__^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static is never used: `MOVES_2x2` [INFO] [stdout] --> src/bin/problem_0599.rs:421:1 [INFO] [stdout] | [INFO] [stdout] 421 | / static MOVES_2x2: &[[u8;4*6];3] = &[ [INFO] [stdout] 422 | | [//Right, Clockwise [INFO] [stdout] 423 | | 00,07, [INFO] [stdout] 424 | | 02,15, [INFO] [stdout] ... | [INFO] [stdout] 445 | | ], [INFO] [stdout] 446 | | ]; [INFO] [stdout] | |__^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_identity_permutation` [INFO] [stdout] --> src/bin/problem_0599.rs:449:8 [INFO] [stdout] | [INFO] [stdout] 449 | fn get_identity_permutation(n: u8) -> Vec { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: associated function is never used: `get_all_moves` [INFO] [stdout] --> src/bin/problem_0599.rs:521:8 [INFO] [stdout] | [INFO] [stdout] 521 | fn get_all_moves(n: u8) -> Vec> { [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static variable `ID_2x2` should have an upper case name [INFO] [stdout] --> src/bin/problem_0599.rs:412:8 [INFO] [stdout] | [INFO] [stdout] 412 | static ID_2x2: &[u8;4*6] = &[ [INFO] [stdout] | ^^^^^^ help: convert the identifier to upper case (notice the capitalization): `ID_2X2` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(non_upper_case_globals)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: static variable `MOVES_2x2` should have an upper case name [INFO] [stdout] --> src/bin/problem_0599.rs:421:8 [INFO] [stdout] | [INFO] [stdout] 421 | static MOVES_2x2: &[[u8;4*6];3] = &[ [INFO] [stdout] | ^^^^^^^^^ help: convert the identifier to upper case (notice the capitalization): `MOVES_2X2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 21 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: use of unstable library feature 'bench_black_box' [INFO] [stdout] --> src/bin/problem_0071.rs:12:13 [INFO] [stdout] | [INFO] [stdout] 12 | core::hint::black_box(solve(1_000_000)); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #64102 for more information [INFO] [stdout] = help: add `#![feature(bench_black_box)]` to the crate attributes to enable [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0658`. [INFO] [stdout] [INFO] [stderr] error: build failed [INFO] [stderr] error: failed to migrate to next edition [INFO] [stderr] [INFO] [stderr] Caused by: [INFO] [stderr] process didn't exit successfully: `cargo fix --edition --allow-no-vcs --allow-dirty --frozen --all --all-targets --message-format=json` (exit status: 101) [INFO] running `Command { std: "docker" "inspect" "349b23088252d128f09c5fa26b0c442c62cc5ec2398fd7f4204e62ecee42aa01", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "349b23088252d128f09c5fa26b0c442c62cc5ec2398fd7f4204e62ecee42aa01", kill_on_drop: false }` [INFO] [stdout] 349b23088252d128f09c5fa26b0c442c62cc5ec2398fd7f4204e62ecee42aa01