Dec 19 18:37:56.758 INFO checking csreid/nqueens-rs against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955 Dec 19 18:37:56.758 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/csreid/nqueens-rs:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"` Dec 19 18:37:57.230 INFO [stdout] 01bdef71e55dc1d25513571a756529657fb7539d229bf5828352a34e568bdcfa Dec 19 18:37:57.258 INFO running `"docker" "start" "-a" "01bdef71e55dc1d25513571a756529657fb7539d229bf5828352a34e568bdcfa"` Dec 19 18:37:58.948 INFO [stderr] Checking stopwatch v0.0.7 Dec 19 18:37:59.428 INFO [stderr] Checking nqueens-rs v0.1.0 (/opt/crater/workdir) Dec 19 18:37:59.952 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:37:59.952 INFO [stderr] --> src/main.rs:118:12 Dec 19 18:37:59.952 INFO [stderr] | Dec 19 18:37:59.952 INFO [stderr] 118 | for i in (0..=N) { Dec 19 18:37:59.952 INFO [stderr] | ^^^^^^^ help: remove these parentheses Dec 19 18:37:59.952 INFO [stderr] | Dec 19 18:37:59.952 INFO [stderr] = note: #[warn(unused_parens)] on by default Dec 19 18:37:59.952 INFO [stderr] Dec 19 18:37:59.952 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:37:59.952 INFO [stderr] --> src/main.rs:119:13 Dec 19 18:37:59.952 INFO [stderr] | Dec 19 18:37:59.952 INFO [stderr] 119 | for j in (0..=N) { Dec 19 18:37:59.952 INFO [stderr] | ^^^^^^^ help: remove these parentheses Dec 19 18:37:59.952 INFO [stderr] Dec 19 18:37:59.952 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:37:59.952 INFO [stderr] --> src/main.rs:182:12 Dec 19 18:37:59.952 INFO [stderr] | Dec 19 18:37:59.952 INFO [stderr] 182 | for i in (0..N) { Dec 19 18:37:59.952 INFO [stderr] | ^^^^^^ help: remove these parentheses Dec 19 18:37:59.952 INFO [stderr] Dec 19 18:37:59.952 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:37:59.952 INFO [stderr] --> src/main.rs:183:13 Dec 19 18:37:59.952 INFO [stderr] | Dec 19 18:37:59.952 INFO [stderr] 183 | for j in (0..N) { Dec 19 18:37:59.952 INFO [stderr] | ^^^^^^ help: remove these parentheses Dec 19 18:37:59.952 INFO [stderr] Dec 19 18:37:59.952 INFO [stderr] warning: unnecessary parentheses around assigned value Dec 19 18:37:59.952 INFO [stderr] --> src/main.rs:245:13 Dec 19 18:37:59.954 INFO [stderr] | Dec 19 18:37:59.954 INFO [stderr] 245 | let time = (sw.elapsed_ms() as f64); Dec 19 18:37:59.954 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses Dec 19 18:37:59.954 INFO [stderr] Dec 19 18:38:00.108 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:38:00.108 INFO [stderr] --> src/main.rs:118:12 Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] 118 | for i in (0..=N) { Dec 19 18:38:00.108 INFO [stderr] | ^^^^^^^ help: remove these parentheses Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] = note: #[warn(unused_parens)] on by default Dec 19 18:38:00.108 INFO [stderr] Dec 19 18:38:00.108 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:38:00.108 INFO [stderr] --> src/main.rs:119:13 Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] 119 | for j in (0..=N) { Dec 19 18:38:00.108 INFO [stderr] | ^^^^^^^ help: remove these parentheses Dec 19 18:38:00.108 INFO [stderr] Dec 19 18:38:00.108 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:38:00.108 INFO [stderr] --> src/main.rs:182:12 Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] 182 | for i in (0..N) { Dec 19 18:38:00.108 INFO [stderr] | ^^^^^^ help: remove these parentheses Dec 19 18:38:00.108 INFO [stderr] Dec 19 18:38:00.108 INFO [stderr] warning: unnecessary parentheses around `for` head expression Dec 19 18:38:00.108 INFO [stderr] --> src/main.rs:183:13 Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] 183 | for j in (0..N) { Dec 19 18:38:00.108 INFO [stderr] | ^^^^^^ help: remove these parentheses Dec 19 18:38:00.108 INFO [stderr] Dec 19 18:38:00.108 INFO [stderr] warning: unnecessary parentheses around assigned value Dec 19 18:38:00.108 INFO [stderr] --> src/main.rs:245:13 Dec 19 18:38:00.108 INFO [stderr] | Dec 19 18:38:00.108 INFO [stderr] 245 | let time = (sw.elapsed_ms() as f64); Dec 19 18:38:00.108 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses Dec 19 18:38:00.108 INFO [stderr] Dec 19 18:38:00.216 INFO [stderr] warning: unused variable: `i` Dec 19 18:38:00.216 INFO [stderr] --> src/main.rs:118:7 Dec 19 18:38:00.216 INFO [stderr] | Dec 19 18:38:00.216 INFO [stderr] 118 | for i in (0..=N) { Dec 19 18:38:00.216 INFO [stderr] | ^ help: consider using `_i` instead Dec 19 18:38:00.216 INFO [stderr] | Dec 19 18:38:00.216 INFO [stderr] = note: #[warn(unused_variables)] on by default Dec 19 18:38:00.216 INFO [stderr] Dec 19 18:38:00.216 INFO [stderr] warning: unused variable: `children` Dec 19 18:38:00.216 INFO [stderr] --> src/main.rs:219:7 Dec 19 18:38:00.216 INFO [stderr] | Dec 19 18:38:00.216 INFO [stderr] 219 | let children = self.children(); Dec 19 18:38:00.216 INFO [stderr] | ^^^^^^^^ help: consider using `_children` instead Dec 19 18:38:00.216 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: method is never used: `n_queens_bestfs` Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:193:2 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 193 | fn n_queens_bestfs(&self, n:i32) -> (Board, i32) { Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: #[warn(dead_code)] on by default Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:78:4 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 78 | write!(f, "+---"); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: #[warn(unused_must_use)] on by default Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:81:3 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 81 | write!(f, "+\n"); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:86:6 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 86 | write!(f, "| Q "); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:88:6 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 88 | write!(f, "| "); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:92:4 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 92 | write!(f, "|\n"); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:95:5 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 95 | write!(f, "+---"); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:97:4 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 97 | write!(f, "+\n"); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.285 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.285 INFO [stderr] Dec 19 18:38:00.285 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time` Dec 19 18:38:00.285 INFO [stderr] --> src/main.rs:220:7 Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.285 INFO [stderr] 220 | let startTime = Stopwatch::start_new(); Dec 19 18:38:00.285 INFO [stderr] | ^^^^^^^^^ Dec 19 18:38:00.285 INFO [stderr] | Dec 19 18:38:00.286 INFO [stderr] = note: #[warn(non_snake_case)] on by default Dec 19 18:38:00.286 INFO [stderr] Dec 19 18:38:00.396 INFO [stderr] warning: unused variable: `i` Dec 19 18:38:00.396 INFO [stderr] --> src/main.rs:118:7 Dec 19 18:38:00.396 INFO [stderr] | Dec 19 18:38:00.396 INFO [stderr] 118 | for i in (0..=N) { Dec 19 18:38:00.396 INFO [stderr] | ^ help: consider using `_i` instead Dec 19 18:38:00.396 INFO [stderr] | Dec 19 18:38:00.396 INFO [stderr] = note: #[warn(unused_variables)] on by default Dec 19 18:38:00.396 INFO [stderr] Dec 19 18:38:00.396 INFO [stderr] warning: unused variable: `children` Dec 19 18:38:00.397 INFO [stderr] --> src/main.rs:219:7 Dec 19 18:38:00.397 INFO [stderr] | Dec 19 18:38:00.397 INFO [stderr] 219 | let children = self.children(); Dec 19 18:38:00.397 INFO [stderr] | ^^^^^^^^ help: consider using `_children` instead Dec 19 18:38:00.397 INFO [stderr] Dec 19 18:38:00.443 INFO [stderr] warning: method is never used: `n_queens_bestfs` Dec 19 18:38:00.443 INFO [stderr] --> src/main.rs:193:2 Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] 193 | fn n_queens_bestfs(&self, n:i32) -> (Board, i32) { Dec 19 18:38:00.443 INFO [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] = note: #[warn(dead_code)] on by default Dec 19 18:38:00.443 INFO [stderr] Dec 19 18:38:00.443 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.443 INFO [stderr] --> src/main.rs:78:4 Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] 78 | write!(f, "+---"); Dec 19 18:38:00.443 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] = note: #[warn(unused_must_use)] on by default Dec 19 18:38:00.443 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.443 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.443 INFO [stderr] Dec 19 18:38:00.443 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.443 INFO [stderr] --> src/main.rs:81:3 Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] 81 | write!(f, "+\n"); Dec 19 18:38:00.443 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.443 INFO [stderr] | Dec 19 18:38:00.443 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.443 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.444 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.444 INFO [stderr] --> src/main.rs:86:6 Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] 86 | write!(f, "| Q "); Dec 19 18:38:00.444 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.444 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.444 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.444 INFO [stderr] --> src/main.rs:88:6 Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] 88 | write!(f, "| "); Dec 19 18:38:00.444 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.444 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.444 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.444 INFO [stderr] --> src/main.rs:92:4 Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] 92 | write!(f, "|\n"); Dec 19 18:38:00.444 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.444 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.444 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.444 INFO [stderr] --> src/main.rs:95:5 Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] 95 | write!(f, "+---"); Dec 19 18:38:00.444 INFO [stderr] | ^^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.444 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.444 INFO [stderr] warning: unused `std::result::Result` that must be used Dec 19 18:38:00.444 INFO [stderr] --> src/main.rs:97:4 Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] 97 | write!(f, "+\n"); Dec 19 18:38:00.444 INFO [stderr] | ^^^^^^^^^^^^^^^^^ Dec 19 18:38:00.444 INFO [stderr] | Dec 19 18:38:00.444 INFO [stderr] = note: this `Result` may be an `Err` variant, which should be handled Dec 19 18:38:00.444 INFO [stderr] = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info) Dec 19 18:38:00.444 INFO [stderr] Dec 19 18:38:00.448 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time` Dec 19 18:38:00.448 INFO [stderr] --> src/main.rs:220:7 Dec 19 18:38:00.448 INFO [stderr] | Dec 19 18:38:00.448 INFO [stderr] 220 | let startTime = Stopwatch::start_new(); Dec 19 18:38:00.448 INFO [stderr] | ^^^^^^^^^ Dec 19 18:38:00.448 INFO [stderr] | Dec 19 18:38:00.448 INFO [stderr] = note: #[warn(non_snake_case)] on by default Dec 19 18:38:00.448 INFO [stderr] Dec 19 18:38:00.488 INFO [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.64s Dec 19 18:38:01.528 INFO running `"docker" "inspect" "01bdef71e55dc1d25513571a756529657fb7539d229bf5828352a34e568bdcfa"` Dec 19 18:38:01.914 INFO running `"docker" "rm" "-f" "01bdef71e55dc1d25513571a756529657fb7539d229bf5828352a34e568bdcfa"` Dec 19 18:38:02.243 INFO [stdout] 01bdef71e55dc1d25513571a756529657fb7539d229bf5828352a34e568bdcfa