[INFO] updating cached repository reem/rust-n-queens [INFO] running `"git" "fetch" "--all"` [INFO] [stdout] Fetching origin [INFO] [stderr] From git://github.com/reem/rust-n-queens [INFO] [stderr] * branch HEAD -> FETCH_HEAD [INFO] running `"git" "clone" "work/cache/sources/gh/reem/rust-n-queens" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/reem/rust-n-queens"` [INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/reem/rust-n-queens'... [INFO] [stderr] done. [INFO] running `"git" "clone" "work/cache/sources/gh/reem/rust-n-queens" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/reem/rust-n-queens"` [INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/reem/rust-n-queens'... [INFO] [stderr] done. [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 9a6e9c463cc3e0d8bd7abc3dc818499cfc097ffa [INFO] sha for GitHub repo reem/rust-n-queens: 9a6e9c463cc3e0d8bd7abc3dc818499cfc097ffa [INFO] validating manifest of reem/rust-n-queens on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] validating manifest of reem/rust-n-queens on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started frobbing reem/rust-n-queens [INFO] finished frobbing reem/rust-n-queens [INFO] frobbed toml for reem/rust-n-queens written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/reem/rust-n-queens/Cargo.toml [INFO] started frobbing reem/rust-n-queens [INFO] finished frobbing reem/rust-n-queens [INFO] frobbed toml for reem/rust-n-queens written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/reem/rust-n-queens/Cargo.toml [INFO] crate reem/rust-n-queens already has a lockfile, it will not be regenerated [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] checking reem/rust-n-queens against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376 [INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-1/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/reem/rust-n-queens:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"` [INFO] [stdout] abbe344f25e3f498dd789500be477f43fb21cff1bf678840ced6f17d634dca98 [INFO] running `"docker" "start" "-a" "abbe344f25e3f498dd789500be477f43fb21cff1bf678840ced6f17d634dca98"` [INFO] [stderr] Checking nqueens v1.0.0 (/opt/crater/workdir) [INFO] [stderr] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{` [INFO] [stderr] --> src/main.rs:120:22 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^ expected one of `)`, `,`, `.`, `?`, or an operator here [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:129:23 [INFO] [stderr] | [INFO] [stderr] 129 | let mut results = 0u; [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:141:25 [INFO] [stderr] | [INFO] [stderr] 141 | for num in range(0, 9u) { [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:149:25 [INFO] [stderr] | [INFO] [stderr] 149 | for num in range(0, 9u) { [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: expected one of `)`, `,`, `.`, `?`, or an operator, found `{` [INFO] [stderr] --> src/main.rs:120:22 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^ expected one of `)`, `,`, `.`, `?`, or an operator here [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:129:23 [INFO] [stderr] | [INFO] [stderr] 129 | let mut results = 0u; [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:141:25 [INFO] [stderr] | [INFO] [stderr] 141 | for num in range(0, 9u) { [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:149:25 [INFO] [stderr] | [INFO] [stderr] 149 | for num in range(0, 9u) { [INFO] [stderr] | ^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable [INFO] [stderr] --> src/main.rs:154:3 [INFO] [stderr] | [INFO] [stderr] 154 | #[bench] [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable [INFO] [stderr] --> src/main.rs:159:3 [INFO] [stderr] | [INFO] [stderr] 159 | #[bench] [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:21:24 [INFO] [stderr] | [INFO] [stderr] 21 | fn n_queens(n: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:23:39 [INFO] [stderr] | [INFO] [stderr] 23 | return n_queens_helper((1 << n as uint) -1, 0, 0, 0); [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:45:87 [INFO] [stderr] | [INFO] [stderr] 45 | fn n_queens_helper(all_ones: i32, left_diags: i32, columns: i32, right_diags: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:100:50 [INFO] [stderr] | [INFO] [stderr] 100 | return solutions + ((columns == all_ones) as uint) [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:108:33 [INFO] [stderr] | [INFO] [stderr] 108 | fn parallel_n_queens(n: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:109:31 [INFO] [stderr] | [INFO] [stderr] 109 | let all_ones = (1 << n as uint) - 1; [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `channel` in this scope [INFO] [stderr] --> src/main.rs:115:20 [INFO] [stderr] | [INFO] [stderr] 115 | let (tx, rx) = channel(); [INFO] [stderr] | ^^^^^^^ not found in this scope [INFO] [stderr] help: possible candidate is found in another module, you can import it into scope [INFO] [stderr] | [INFO] [stderr] 4 | use std::sync::mpsc::channel; [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `spawn` in this scope [INFO] [stderr] --> src/main.rs:120:9 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^^^^^ not found in this scope [INFO] [stderr] help: possible candidate is found in another module, you can import it into scope [INFO] [stderr] | [INFO] [stderr] 4 | use std::thread::spawn; [INFO] [stderr] | [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `proc` in this scope [INFO] [stderr] --> src/main.rs:120:15 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:130:38 [INFO] [stderr] | [INFO] [stderr] 130 | for value in rx.iter().take(n as uint) { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:133:48 [INFO] [stderr] | [INFO] [stderr] 133 | return results + ((columns == all_ones) as uint) [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/main.rs:90:13 [INFO] [stderr] | [INFO] [stderr] 90 | (columns | spot), [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/main.rs:124:17 [INFO] [stderr] | [INFO] [stderr] 124 | (columns | spot), [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] error: aborting due to 17 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0412, E0425, E0658. [INFO] [stderr] For more information about an error, try `rustc --explain E0412`. [INFO] [stderr] error: Could not compile `nqueens`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:140:47 [INFO] [stderr] | [INFO] [stderr] 140 | let real = vec!(1, 1, 0, 0, 2, 10, 4, 40, 92u); [INFO] [stderr] | ^^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error: invalid suffix `u` for integer literal [INFO] [stderr] --> src/main.rs:148:47 [INFO] [stderr] | [INFO] [stderr] 148 | let real = vec!(1, 1, 0, 0, 2, 10, 4, 40, 92u); [INFO] [stderr] | ^^^ invalid suffix `u` [INFO] [stderr] | [INFO] [stderr] = help: the suffix must be one of the integral types (`u32`, `isize`, etc) [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable [INFO] [stderr] --> src/main.rs:154:3 [INFO] [stderr] | [INFO] [stderr] 154 | #[bench] [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test': `bench` is a part of custom test frameworks which are unstable [INFO] [stderr] --> src/main.rs:159:3 [INFO] [stderr] | [INFO] [stderr] 159 | #[bench] [INFO] [stderr] | ^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:21:24 [INFO] [stderr] | [INFO] [stderr] 21 | fn n_queens(n: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:23:39 [INFO] [stderr] | [INFO] [stderr] 23 | return n_queens_helper((1 << n as uint) -1, 0, 0, 0); [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:45:87 [INFO] [stderr] | [INFO] [stderr] 45 | fn n_queens_helper(all_ones: i32, left_diags: i32, columns: i32, right_diags: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:100:50 [INFO] [stderr] | [INFO] [stderr] 100 | return solutions + ((columns == all_ones) as uint) [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:108:33 [INFO] [stderr] | [INFO] [stderr] 108 | fn parallel_n_queens(n: i32) -> uint { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:109:31 [INFO] [stderr] | [INFO] [stderr] 109 | let all_ones = (1 << n as uint) - 1; [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `channel` in this scope [INFO] [stderr] --> src/main.rs:115:20 [INFO] [stderr] | [INFO] [stderr] 115 | let (tx, rx) = channel(); [INFO] [stderr] | ^^^^^^^ not found in this scope [INFO] [stderr] help: possible candidate is found in another module, you can import it into scope [INFO] [stderr] | [INFO] [stderr] 2 | #[cfg(test)] use std::sync::mpsc::channel; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `spawn` in this scope [INFO] [stderr] --> src/main.rs:120:9 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^^^^^ not found in this scope [INFO] [stderr] help: possible candidate is found in another module, you can import it into scope [INFO] [stderr] | [INFO] [stderr] 2 | #[cfg(test)] use std::thread::spawn; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `proc` in this scope [INFO] [stderr] --> src/main.rs:120:15 [INFO] [stderr] | [INFO] [stderr] 120 | spawn(proc() { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:130:38 [INFO] [stderr] | [INFO] [stderr] 130 | for value in rx.iter().take(n as uint) { [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0412]: cannot find type `uint` in this scope [INFO] [stderr] --> src/main.rs:133:48 [INFO] [stderr] | [INFO] [stderr] 133 | return results + ((columns == all_ones) as uint) [INFO] [stderr] | ^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `range` in this scope [INFO] [stderr] --> src/main.rs:141:16 [INFO] [stderr] | [INFO] [stderr] 141 | for num in range(0, 9u) { [INFO] [stderr] | ^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] error[E0425]: cannot find function `range` in this scope [INFO] [stderr] --> src/main.rs:149:16 [INFO] [stderr] | [INFO] [stderr] 149 | for num in range(0, 9u) { [INFO] [stderr] | ^^^^^ not found in this scope [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/main.rs:90:13 [INFO] [stderr] | [INFO] [stderr] 90 | (columns | spot), [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_parens)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unnecessary parentheses around function argument [INFO] [stderr] --> src/main.rs:124:17 [INFO] [stderr] | [INFO] [stderr] 124 | (columns | spot), [INFO] [stderr] | ^^^^^^^^^^^^^^^^ help: remove these parentheses [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:1:14 [INFO] [stderr] | [INFO] [stderr] 1 | #[cfg(test)] extern crate test; [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:2:18 [INFO] [stderr] | [INFO] [stderr] 2 | #[cfg(test)] use test::Bencher; [INFO] [stderr] | ^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:155:27 [INFO] [stderr] | [INFO] [stderr] 155 | fn bench_n_queens(b: &mut Bencher) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:156:17 [INFO] [stderr] | [INFO] [stderr] 156 | b.iter(|| { test::black_box(n_queens(12)); }); [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:160:36 [INFO] [stderr] | [INFO] [stderr] 160 | fn bench_parallel_n_queens(b: &mut Bencher) { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:161:17 [INFO] [stderr] | [INFO] [stderr] 161 | b.iter(|| { test::black_box(parallel_n_queens(12)); }); [INFO] [stderr] | ^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:156:7 [INFO] [stderr] | [INFO] [stderr] 156 | b.iter(|| { test::black_box(n_queens(12)); }); [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error[E0658]: use of unstable library feature 'test' [INFO] [stderr] --> src/main.rs:161:7 [INFO] [stderr] | [INFO] [stderr] 161 | b.iter(|| { test::black_box(parallel_n_queens(12)); }); [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: for more information, see https://github.com/rust-lang/rust/issues/50297 [INFO] [stderr] = help: add `#![feature(test)]` to the crate attributes to enable [INFO] [stderr] [INFO] [stderr] error: aborting due to 29 previous errors [INFO] [stderr] [INFO] [stderr] Some errors have detailed explanations: E0412, E0425, E0658. [INFO] [stderr] For more information about an error, try `rustc --explain E0412`. [INFO] [stderr] error: Could not compile `nqueens`. [INFO] [stderr] [INFO] [stderr] To learn more, run the command again with --verbose. [INFO] running `"docker" "inspect" "abbe344f25e3f498dd789500be477f43fb21cff1bf678840ced6f17d634dca98"` [INFO] running `"docker" "rm" "-f" "abbe344f25e3f498dd789500be477f43fb21cff1bf678840ced6f17d634dca98"` [INFO] [stdout] abbe344f25e3f498dd789500be477f43fb21cff1bf678840ced6f17d634dca98