Dec 13 22:48:37.254 INFO testing csreid/nqueens-rs against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 13 22:48:37.254 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-3/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 22:48:37.832 INFO [stdout] 1160fbd3b48eeb91764852e78946053304b4cf695f4555012d04ecf6921167a7
Dec 13 22:48:37.834 INFO running `"docker" "start" "-a" "1160fbd3b48eeb91764852e78946053304b4cf695f4555012d04ecf6921167a7"`
Dec 13 22:48:40.099 INFO [stderr] usermod: no changes
Dec 13 22:48:40.191 INFO [stderr]    Compiling stopwatch v0.0.7
Dec 13 22:48:41.462 INFO [stderr]    Compiling nqueens-rs v0.1.0 (/source)
Dec 13 22:48:42.155 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:42.155 INFO [stderr]    --> src/main.rs:118:12
Dec 13 22:48:42.155 INFO [stderr]     |
Dec 13 22:48:42.156 INFO [stderr] 118 |         for i in (0..=N) {
Dec 13 22:48:42.156 INFO [stderr]     |                  ^^^^^^^ help: remove these parentheses
Dec 13 22:48:42.156 INFO [stderr]     |
Dec 13 22:48:42.156 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 13 22:48:42.156 INFO [stderr] 
Dec 13 22:48:42.157 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:42.157 INFO [stderr]    --> src/main.rs:119:13
Dec 13 22:48:42.157 INFO [stderr]     |
Dec 13 22:48:42.157 INFO [stderr] 119 |             for j in (0..=N) {
Dec 13 22:48:42.158 INFO [stderr]     |                      ^^^^^^^ help: remove these parentheses
Dec 13 22:48:42.158 INFO [stderr] 
Dec 13 22:48:42.158 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:42.158 INFO [stderr]    --> src/main.rs:182:12
Dec 13 22:48:42.158 INFO [stderr]     |
Dec 13 22:48:42.158 INFO [stderr] 182 |         for i in (0..N) {
Dec 13 22:48:42.158 INFO [stderr]     |                  ^^^^^^ help: remove these parentheses
Dec 13 22:48:42.158 INFO [stderr] 
Dec 13 22:48:42.158 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:42.158 INFO [stderr]    --> src/main.rs:183:13
Dec 13 22:48:42.158 INFO [stderr]     |
Dec 13 22:48:42.158 INFO [stderr] 183 |             for j in (0..N) {
Dec 13 22:48:42.158 INFO [stderr]     |                      ^^^^^^ help: remove these parentheses
Dec 13 22:48:42.158 INFO [stderr] 
Dec 13 22:48:42.158 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 13 22:48:42.163 INFO [stderr]    --> src/main.rs:245:13
Dec 13 22:48:42.163 INFO [stderr]     |
Dec 13 22:48:42.163 INFO [stderr] 245 |     let time = (sw.elapsed_ms() as f64);
Dec 13 22:48:42.163 INFO [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 13 22:48:42.163 INFO [stderr] 
Dec 13 22:48:42.255 INFO [stderr] warning: unused variable: `i`
Dec 13 22:48:42.255 INFO [stderr]    --> src/main.rs:118:7
Dec 13 22:48:42.256 INFO [stderr]     |
Dec 13 22:48:42.256 INFO [stderr] 118 |         for i in (0..=N) {
Dec 13 22:48:42.256 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 13 22:48:42.256 INFO [stderr]     |
Dec 13 22:48:42.256 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 13 22:48:42.256 INFO [stderr] 
Dec 13 22:48:42.256 INFO [stderr] warning: unused variable: `children`
Dec 13 22:48:42.256 INFO [stderr]    --> src/main.rs:219:7
Dec 13 22:48:42.256 INFO [stderr]     |
Dec 13 22:48:42.256 INFO [stderr] 219 |         let children = self.children();
Dec 13 22:48:42.256 INFO [stderr]     |             ^^^^^^^^ help: consider using `_children` instead
Dec 13 22:48:42.256 INFO [stderr] 
Dec 13 22:48:42.278 INFO [stderr] warning: method is never used: `n_queens_bestfs`
Dec 13 22:48:42.278 INFO [stderr]    --> src/main.rs:193:2
Dec 13 22:48:42.278 INFO [stderr]     |
Dec 13 22:48:42.279 INFO [stderr] 193 |     fn n_queens_bestfs(&self, n:i32) -> (Board, i32) {
Dec 13 22:48:42.279 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.279 INFO [stderr]     |
Dec 13 22:48:42.279 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 13 22:48:42.279 INFO [stderr] 
Dec 13 22:48:42.279 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.279 INFO [stderr]   --> src/main.rs:78:4
Dec 13 22:48:42.279 INFO [stderr]    |
Dec 13 22:48:42.279 INFO [stderr] 78 |             write!(f, "+---");
Dec 13 22:48:42.279 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.279 INFO [stderr]    |
Dec 13 22:48:42.279 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 22:48:42.279 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.279 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 13 22:48:42.279 INFO [stderr] 
Dec 13 22:48:42.279 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.280 INFO [stderr]   --> src/main.rs:81:3
Dec 13 22:48:42.280 INFO [stderr]    |
Dec 13 22:48:42.280 INFO [stderr] 81 |         write!(f, "+\n");
Dec 13 22:48:42.280 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.280 INFO [stderr]    |
Dec 13 22:48:42.280 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.280 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 13 22:48:42.280 INFO [stderr] 
Dec 13 22:48:42.280 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.280 INFO [stderr]   --> src/main.rs:86:6
Dec 13 22:48:42.280 INFO [stderr]    |
Dec 13 22:48:42.280 INFO [stderr] 86 |                     write!(f, "| Q ");
Dec 13 22:48:42.280 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.281 INFO [stderr]    |
Dec 13 22:48:42.281 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.281 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 13 22:48:42.281 INFO [stderr] 
Dec 13 22:48:42.281 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.281 INFO [stderr]   --> src/main.rs:88:6
Dec 13 22:48:42.281 INFO [stderr]    |
Dec 13 22:48:42.281 INFO [stderr] 88 |                     write!(f, "|   ");
Dec 13 22:48:42.281 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.281 INFO [stderr]    |
Dec 13 22:48:42.281 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.281 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 13 22:48:42.281 INFO [stderr] 
Dec 13 22:48:42.282 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.282 INFO [stderr]   --> src/main.rs:92:4
Dec 13 22:48:42.282 INFO [stderr]    |
Dec 13 22:48:42.282 INFO [stderr] 92 |             write!(f, "|\n");
Dec 13 22:48:42.282 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.282 INFO [stderr]    |
Dec 13 22:48:42.282 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.282 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 13 22:48:42.282 INFO [stderr] 
Dec 13 22:48:42.282 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.282 INFO [stderr]   --> src/main.rs:95:5
Dec 13 22:48:42.282 INFO [stderr]    |
Dec 13 22:48:42.282 INFO [stderr] 95 |                 write!(f, "+---");
Dec 13 22:48:42.282 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.283 INFO [stderr]    |
Dec 13 22:48:42.283 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.283 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 13 22:48:42.283 INFO [stderr] 
Dec 13 22:48:42.283 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:42.283 INFO [stderr]   --> src/main.rs:97:4
Dec 13 22:48:42.283 INFO [stderr]    |
Dec 13 22:48:42.283 INFO [stderr] 97 |             write!(f, "+\n");
Dec 13 22:48:42.283 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 13 22:48:42.283 INFO [stderr]    |
Dec 13 22:48:42.283 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:42.283 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 13 22:48:42.283 INFO [stderr] 
Dec 13 22:48:42.283 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time`
Dec 13 22:48:42.284 INFO [stderr]    --> src/main.rs:220:7
Dec 13 22:48:42.284 INFO [stderr]     |
Dec 13 22:48:42.284 INFO [stderr] 220 |         let startTime = Stopwatch::start_new();
Dec 13 22:48:42.284 INFO [stderr]     |             ^^^^^^^^^
Dec 13 22:48:42.284 INFO [stderr]     |
Dec 13 22:48:42.284 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 13 22:48:42.284 INFO [stderr] 
Dec 13 22:48:43.203 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
Dec 13 22:48:43.204 INFO [stderr] su: No module specific data is present
Dec 13 22:48:44.227 INFO running `"docker" "inspect" "1160fbd3b48eeb91764852e78946053304b4cf695f4555012d04ecf6921167a7"`
Dec 13 22:48:44.480 INFO running `"docker" "rm" "-f" "1160fbd3b48eeb91764852e78946053304b4cf695f4555012d04ecf6921167a7"`
Dec 13 22:48:44.779 INFO [stdout] 1160fbd3b48eeb91764852e78946053304b4cf695f4555012d04ecf6921167a7
Dec 13 22:48:44.785 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-3/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 22:48:45.675 INFO [stdout] b457a9a9a263584cd96c16e0656e21d619814d394721bf642d84acb855d485d1
Dec 13 22:48:45.683 INFO running `"docker" "start" "-a" "b457a9a9a263584cd96c16e0656e21d619814d394721bf642d84acb855d485d1"`
Dec 13 22:48:46.938 INFO [stderr] usermod: no changes
Dec 13 22:48:47.007 INFO [stderr]    Compiling nqueens-rs v0.1.0 (/source)
Dec 13 22:48:47.923 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:47.923 INFO [stderr]    --> src/main.rs:118:12
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr] 118 |         for i in (0..=N) {
Dec 13 22:48:47.923 INFO [stderr]     |                  ^^^^^^^ help: remove these parentheses
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 13 22:48:47.923 INFO [stderr] 
Dec 13 22:48:47.923 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:47.923 INFO [stderr]    --> src/main.rs:119:13
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr] 119 |             for j in (0..=N) {
Dec 13 22:48:47.923 INFO [stderr]     |                      ^^^^^^^ help: remove these parentheses
Dec 13 22:48:47.923 INFO [stderr] 
Dec 13 22:48:47.923 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:47.923 INFO [stderr]    --> src/main.rs:182:12
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr] 182 |         for i in (0..N) {
Dec 13 22:48:47.923 INFO [stderr]     |                  ^^^^^^ help: remove these parentheses
Dec 13 22:48:47.923 INFO [stderr] 
Dec 13 22:48:47.923 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 13 22:48:47.923 INFO [stderr]    --> src/main.rs:183:13
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr] 183 |             for j in (0..N) {
Dec 13 22:48:47.923 INFO [stderr]     |                      ^^^^^^ help: remove these parentheses
Dec 13 22:48:47.923 INFO [stderr] 
Dec 13 22:48:47.923 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 13 22:48:47.923 INFO [stderr]    --> src/main.rs:245:13
Dec 13 22:48:47.923 INFO [stderr]     |
Dec 13 22:48:47.923 INFO [stderr] 245 |     let time = (sw.elapsed_ms() as f64);
Dec 13 22:48:47.923 INFO [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 13 22:48:47.923 INFO [stderr] 
Dec 13 22:48:48.003 INFO [stderr] warning: unused variable: `i`
Dec 13 22:48:48.003 INFO [stderr]    --> src/main.rs:118:7
Dec 13 22:48:48.003 INFO [stderr]     |
Dec 13 22:48:48.003 INFO [stderr] 118 |         for i in (0..=N) {
Dec 13 22:48:48.003 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 13 22:48:48.003 INFO [stderr]     |
Dec 13 22:48:48.011 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 13 22:48:48.011 INFO [stderr] 
Dec 13 22:48:48.011 INFO [stderr] warning: unused variable: `children`
Dec 13 22:48:48.011 INFO [stderr]    --> src/main.rs:219:7
Dec 13 22:48:48.011 INFO [stderr]     |
Dec 13 22:48:48.011 INFO [stderr] 219 |         let children = self.children();
Dec 13 22:48:48.011 INFO [stderr]     |             ^^^^^^^^ help: consider using `_children` instead
Dec 13 22:48:48.011 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: method is never used: `n_queens_bestfs`
Dec 13 22:48:48.031 INFO [stderr]    --> src/main.rs:193:2
Dec 13 22:48:48.031 INFO [stderr]     |
Dec 13 22:48:48.031 INFO [stderr] 193 |     fn n_queens_bestfs(&self, n:i32) -> (Board, i32) {
Dec 13 22:48:48.031 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]     |
Dec 13 22:48:48.031 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:78:4
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 78 |             write!(f, "+---");
Dec 13 22:48:48.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:81:3
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 81 |         write!(f, "+\n");
Dec 13 22:48:48.031 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:86:6
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 86 |                     write!(f, "| Q ");
Dec 13 22:48:48.031 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:88:6
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 88 |                     write!(f, "|   ");
Dec 13 22:48:48.031 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:92:4
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 92 |             write!(f, "|\n");
Dec 13 22:48:48.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:95:5
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 95 |                 write!(f, "+---");
Dec 13 22:48:48.031 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 13 22:48:48.031 INFO [stderr]   --> src/main.rs:97:4
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr] 97 |             write!(f, "+\n");
Dec 13 22:48:48.031 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]    |
Dec 13 22:48:48.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 13 22:48:48.031 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 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.031 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time`
Dec 13 22:48:48.031 INFO [stderr]    --> src/main.rs:220:7
Dec 13 22:48:48.031 INFO [stderr]     |
Dec 13 22:48:48.031 INFO [stderr] 220 |         let startTime = Stopwatch::start_new();
Dec 13 22:48:48.031 INFO [stderr]     |             ^^^^^^^^^
Dec 13 22:48:48.031 INFO [stderr]     |
Dec 13 22:48:48.031 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 13 22:48:48.031 INFO [stderr] 
Dec 13 22:48:48.367 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.40s
Dec 13 22:48:48.369 INFO [stderr] su: No module specific data is present
Dec 13 22:48:49.004 INFO running `"docker" "inspect" "b457a9a9a263584cd96c16e0656e21d619814d394721bf642d84acb855d485d1"`
Dec 13 22:48:49.271 INFO running `"docker" "rm" "-f" "b457a9a9a263584cd96c16e0656e21d619814d394721bf642d84acb855d485d1"`
Dec 13 22:48:49.501 INFO [stdout] b457a9a9a263584cd96c16e0656e21d619814d394721bf642d84acb855d485d1
Dec 13 22:48:49.505 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-3/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 13 22:48:49.799 INFO [stdout] 7796a99ab8d8b2d4cbc8675296cb3492b48875afa81b00e796bfe750b15d8f80
Dec 13 22:48:49.799 INFO running `"docker" "start" "-a" "7796a99ab8d8b2d4cbc8675296cb3492b48875afa81b00e796bfe750b15d8f80"`
Dec 13 22:48:50.731 INFO [stderr] usermod: no changes
Dec 13 22:48:50.847 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
Dec 13 22:48:50.863 INFO [stderr]      Running /target/debug/deps/nqueens_rs-feec3b5168b94457
Dec 13 22:48:50.863 INFO [stdout] 
Dec 13 22:48:50.863 INFO [stdout] running 0 tests
Dec 13 22:48:50.863 INFO [stdout] 
Dec 13 22:48:50.863 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 22:48:50.863 INFO [stdout] 
Dec 13 22:48:50.871 INFO [stderr] su: No module specific data is present
Dec 13 22:48:52.085 INFO running `"docker" "inspect" "7796a99ab8d8b2d4cbc8675296cb3492b48875afa81b00e796bfe750b15d8f80"`
Dec 13 22:48:52.387 INFO running `"docker" "rm" "-f" "7796a99ab8d8b2d4cbc8675296cb3492b48875afa81b00e796bfe750b15d8f80"`
Dec 13 22:48:52.714 INFO [stdout] 7796a99ab8d8b2d4cbc8675296cb3492b48875afa81b00e796bfe750b15d8f80