Dec 06 02:59:19.027 INFO testing csreid/nqueens-rs against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 02:59:19.027 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 02:59:19.586 INFO [stdout] 3e8507023786772016806caa70c8941ebe1410ae88483b9adfcd8c3bda85ee87
Dec 06 02:59:19.588 INFO running `"docker" "start" "-a" "3e8507023786772016806caa70c8941ebe1410ae88483b9adfcd8c3bda85ee87"`
Dec 06 02:59:20.836 INFO [stderr] usermod: no changes
Dec 06 02:59:20.916 INFO [stderr]    Compiling stopwatch v0.0.7
Dec 06 02:59:21.806 INFO [stderr]    Compiling nqueens-rs v0.1.0 (/source)
Dec 06 02:59:22.540 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:22.540 INFO [stderr]    --> src/main.rs:118:12
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr] 118 |         for i in (0..=N) {
Dec 06 02:59:22.540 INFO [stderr]     |                  ^^^^^^^ help: remove these parentheses
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 06 02:59:22.540 INFO [stderr] 
Dec 06 02:59:22.540 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:22.540 INFO [stderr]    --> src/main.rs:119:13
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr] 119 |             for j in (0..=N) {
Dec 06 02:59:22.540 INFO [stderr]     |                      ^^^^^^^ help: remove these parentheses
Dec 06 02:59:22.540 INFO [stderr] 
Dec 06 02:59:22.540 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:22.540 INFO [stderr]    --> src/main.rs:182:12
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr] 182 |         for i in (0..N) {
Dec 06 02:59:22.540 INFO [stderr]     |                  ^^^^^^ help: remove these parentheses
Dec 06 02:59:22.540 INFO [stderr] 
Dec 06 02:59:22.540 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:22.540 INFO [stderr]    --> src/main.rs:183:13
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr] 183 |             for j in (0..N) {
Dec 06 02:59:22.540 INFO [stderr]     |                      ^^^^^^ help: remove these parentheses
Dec 06 02:59:22.540 INFO [stderr] 
Dec 06 02:59:22.540 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 06 02:59:22.540 INFO [stderr]    --> src/main.rs:245:13
Dec 06 02:59:22.540 INFO [stderr]     |
Dec 06 02:59:22.540 INFO [stderr] 245 |     let time = (sw.elapsed_ms() as f64);
Dec 06 02:59:22.540 INFO [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 06 02:59:22.540 INFO [stderr] 
Dec 06 02:59:22.636 INFO [stderr] warning: unused variable: `i`
Dec 06 02:59:22.636 INFO [stderr]    --> src/main.rs:118:7
Dec 06 02:59:22.636 INFO [stderr]     |
Dec 06 02:59:22.636 INFO [stderr] 118 |         for i in (0..=N) {
Dec 06 02:59:22.636 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 06 02:59:22.636 INFO [stderr]     |
Dec 06 02:59:22.636 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 02:59:22.636 INFO [stderr] 
Dec 06 02:59:22.636 INFO [stderr] warning: unused variable: `children`
Dec 06 02:59:22.636 INFO [stderr]    --> src/main.rs:219:7
Dec 06 02:59:22.636 INFO [stderr]     |
Dec 06 02:59:22.636 INFO [stderr] 219 |         let children = self.children();
Dec 06 02:59:22.636 INFO [stderr]     |             ^^^^^^^^ help: consider using `_children` instead
Dec 06 02:59:22.636 INFO [stderr] 
Dec 06 02:59:22.652 INFO [stderr] warning: method is never used: `n_queens_bestfs`
Dec 06 02:59:22.652 INFO [stderr]    --> src/main.rs:193:2
Dec 06 02:59:22.652 INFO [stderr]     |
Dec 06 02:59:22.652 INFO [stderr] 193 |     fn n_queens_bestfs(&self, n:i32) -> (Board, i32) {
Dec 06 02:59:22.652 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.652 INFO [stderr]     |
Dec 06 02:59:22.652 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 02:59:22.652 INFO [stderr] 
Dec 06 02:59:22.653 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.653 INFO [stderr]   --> src/main.rs:78:4
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr] 78 |             write!(f, "+---");
Dec 06 02:59:22.653 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 02:59:22.653 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.653 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 06 02:59:22.653 INFO [stderr] 
Dec 06 02:59:22.653 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.653 INFO [stderr]   --> src/main.rs:81:3
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr] 81 |         write!(f, "+\n");
Dec 06 02:59:22.653 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.653 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 06 02:59:22.653 INFO [stderr] 
Dec 06 02:59:22.653 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.653 INFO [stderr]   --> src/main.rs:86:6
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr] 86 |                     write!(f, "| Q ");
Dec 06 02:59:22.653 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.653 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 06 02:59:22.653 INFO [stderr] 
Dec 06 02:59:22.653 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.653 INFO [stderr]   --> src/main.rs:88:6
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr] 88 |                     write!(f, "|   ");
Dec 06 02:59:22.653 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.653 INFO [stderr]    |
Dec 06 02:59:22.653 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.653 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 06 02:59:22.654 INFO [stderr] 
Dec 06 02:59:22.654 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.654 INFO [stderr]   --> src/main.rs:92:4
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr] 92 |             write!(f, "|\n");
Dec 06 02:59:22.654 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.654 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 06 02:59:22.654 INFO [stderr] 
Dec 06 02:59:22.654 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.654 INFO [stderr]   --> src/main.rs:95:5
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr] 95 |                 write!(f, "+---");
Dec 06 02:59:22.654 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.654 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 06 02:59:22.654 INFO [stderr] 
Dec 06 02:59:22.654 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:22.654 INFO [stderr]   --> src/main.rs:97:4
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr] 97 |             write!(f, "+\n");
Dec 06 02:59:22.654 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 06 02:59:22.654 INFO [stderr]    |
Dec 06 02:59:22.654 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:22.660 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 06 02:59:22.660 INFO [stderr] 
Dec 06 02:59:22.660 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time`
Dec 06 02:59:22.660 INFO [stderr]    --> src/main.rs:220:7
Dec 06 02:59:22.660 INFO [stderr]     |
Dec 06 02:59:22.660 INFO [stderr] 220 |         let startTime = Stopwatch::start_new();
Dec 06 02:59:22.660 INFO [stderr]     |             ^^^^^^^^^
Dec 06 02:59:22.660 INFO [stderr]     |
Dec 06 02:59:22.660 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 06 02:59:22.660 INFO [stderr] 
Dec 06 02:59:23.256 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
Dec 06 02:59:23.256 INFO [stderr] su: No module specific data is present
Dec 06 02:59:23.524 INFO running `"docker" "inspect" "3e8507023786772016806caa70c8941ebe1410ae88483b9adfcd8c3bda85ee87"`
Dec 06 02:59:23.599 INFO running `"docker" "rm" "-f" "3e8507023786772016806caa70c8941ebe1410ae88483b9adfcd8c3bda85ee87"`
Dec 06 02:59:23.674 INFO [stdout] 3e8507023786772016806caa70c8941ebe1410ae88483b9adfcd8c3bda85ee87
Dec 06 02:59:23.677 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 02:59:23.852 INFO [stdout] 3e5c056c23ed7d71237810be20ecbf61f404bd2aaf878ddbd47be9aa646bb371
Dec 06 02:59:23.857 INFO running `"docker" "start" "-a" "3e5c056c23ed7d71237810be20ecbf61f404bd2aaf878ddbd47be9aa646bb371"`
Dec 06 02:59:24.204 INFO [stderr] usermod: no changes
Dec 06 02:59:24.254 INFO [stderr]    Compiling nqueens-rs v0.1.0 (/source)
Dec 06 02:59:24.866 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:24.866 INFO [stderr]    --> src/main.rs:118:12
Dec 06 02:59:24.866 INFO [stderr]     |
Dec 06 02:59:24.866 INFO [stderr] 118 |         for i in (0..=N) {
Dec 06 02:59:24.868 INFO [stderr]     |                  ^^^^^^^ help: remove these parentheses
Dec 06 02:59:24.868 INFO [stderr]     |
Dec 06 02:59:24.868 INFO [stderr]     = note: #[warn(unused_parens)] on by default
Dec 06 02:59:24.868 INFO [stderr] 
Dec 06 02:59:24.868 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:24.868 INFO [stderr]    --> src/main.rs:119:13
Dec 06 02:59:24.868 INFO [stderr]     |
Dec 06 02:59:24.868 INFO [stderr] 119 |             for j in (0..=N) {
Dec 06 02:59:24.868 INFO [stderr]     |                      ^^^^^^^ help: remove these parentheses
Dec 06 02:59:24.868 INFO [stderr] 
Dec 06 02:59:24.868 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:24.868 INFO [stderr]    --> src/main.rs:182:12
Dec 06 02:59:24.868 INFO [stderr]     |
Dec 06 02:59:24.868 INFO [stderr] 182 |         for i in (0..N) {
Dec 06 02:59:24.868 INFO [stderr]     |                  ^^^^^^ help: remove these parentheses
Dec 06 02:59:24.868 INFO [stderr] 
Dec 06 02:59:24.868 INFO [stderr] warning: unnecessary parentheses around `for` head expression
Dec 06 02:59:24.868 INFO [stderr]    --> src/main.rs:183:13
Dec 06 02:59:24.869 INFO [stderr]     |
Dec 06 02:59:24.869 INFO [stderr] 183 |             for j in (0..N) {
Dec 06 02:59:24.869 INFO [stderr]     |                      ^^^^^^ help: remove these parentheses
Dec 06 02:59:24.871 INFO [stderr] 
Dec 06 02:59:24.871 INFO [stderr] warning: unnecessary parentheses around assigned value
Dec 06 02:59:24.871 INFO [stderr]    --> src/main.rs:245:13
Dec 06 02:59:24.871 INFO [stderr]     |
Dec 06 02:59:24.871 INFO [stderr] 245 |     let time = (sw.elapsed_ms() as f64);
Dec 06 02:59:24.871 INFO [stderr]     |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 06 02:59:24.871 INFO [stderr] 
Dec 06 02:59:24.971 INFO [stderr] warning: unused variable: `i`
Dec 06 02:59:24.971 INFO [stderr]    --> src/main.rs:118:7
Dec 06 02:59:24.971 INFO [stderr]     |
Dec 06 02:59:24.971 INFO [stderr] 118 |         for i in (0..=N) {
Dec 06 02:59:24.971 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 06 02:59:24.971 INFO [stderr]     |
Dec 06 02:59:24.971 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 06 02:59:24.971 INFO [stderr] 
Dec 06 02:59:24.971 INFO [stderr] warning: unused variable: `children`
Dec 06 02:59:24.971 INFO [stderr]    --> src/main.rs:219:7
Dec 06 02:59:24.971 INFO [stderr]     |
Dec 06 02:59:24.971 INFO [stderr] 219 |         let children = self.children();
Dec 06 02:59:24.971 INFO [stderr]     |             ^^^^^^^^ help: consider using `_children` instead
Dec 06 02:59:24.971 INFO [stderr] 
Dec 06 02:59:24.992 INFO [stderr] warning: method is never used: `n_queens_bestfs`
Dec 06 02:59:24.992 INFO [stderr]    --> src/main.rs:193:2
Dec 06 02:59:24.992 INFO [stderr]     |
Dec 06 02:59:24.992 INFO [stderr] 193 |     fn n_queens_bestfs(&self, n:i32) -> (Board, i32) {
Dec 06 02:59:24.992 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.992 INFO [stderr]     |
Dec 06 02:59:24.992 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 06 02:59:24.992 INFO [stderr] 
Dec 06 02:59:24.993 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.993 INFO [stderr]   --> src/main.rs:78:4
Dec 06 02:59:24.993 INFO [stderr]    |
Dec 06 02:59:24.993 INFO [stderr] 78 |             write!(f, "+---");
Dec 06 02:59:24.993 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:81:3
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 81 |         write!(f, "+\n");
Dec 06 02:59:24.995 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:86:6
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 86 |                     write!(f, "| Q ");
Dec 06 02:59:24.995 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:88:6
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 88 |                     write!(f, "|   ");
Dec 06 02:59:24.995 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:92:4
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 92 |             write!(f, "|\n");
Dec 06 02:59:24.995 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:95:5
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 95 |                 write!(f, "+---");
Dec 06 02:59:24.995 INFO [stderr]    |                 ^^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 06 02:59:24.995 INFO [stderr]   --> src/main.rs:97:4
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr] 97 |             write!(f, "+\n");
Dec 06 02:59:24.995 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]    |
Dec 06 02:59:24.995 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 06 02:59:24.995 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 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:24.995 INFO [stderr] warning: variable `startTime` should have a snake case name such as `start_time`
Dec 06 02:59:24.995 INFO [stderr]    --> src/main.rs:220:7
Dec 06 02:59:24.995 INFO [stderr]     |
Dec 06 02:59:24.995 INFO [stderr] 220 |         let startTime = Stopwatch::start_new();
Dec 06 02:59:24.995 INFO [stderr]     |             ^^^^^^^^^
Dec 06 02:59:24.995 INFO [stderr]     |
Dec 06 02:59:24.995 INFO [stderr]     = note: #[warn(non_snake_case)] on by default
Dec 06 02:59:24.995 INFO [stderr] 
Dec 06 02:59:25.240 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
Dec 06 02:59:25.241 INFO [stderr] su: No module specific data is present
Dec 06 02:59:25.689 INFO running `"docker" "inspect" "3e5c056c23ed7d71237810be20ecbf61f404bd2aaf878ddbd47be9aa646bb371"`
Dec 06 02:59:25.815 INFO running `"docker" "rm" "-f" "3e5c056c23ed7d71237810be20ecbf61f404bd2aaf878ddbd47be9aa646bb371"`
Dec 06 02:59:25.936 INFO [stdout] 3e5c056c23ed7d71237810be20ecbf61f404bd2aaf878ddbd47be9aa646bb371
Dec 06 02:59:25.936 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-6/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 02:59:26.215 INFO [stdout] 60c223cd8a017ef16a7fa8333cd60f813a96210f0664600b7f53d1ac9de55dc8
Dec 06 02:59:26.218 INFO running `"docker" "start" "-a" "60c223cd8a017ef16a7fa8333cd60f813a96210f0664600b7f53d1ac9de55dc8"`
Dec 06 02:59:27.020 INFO [stderr] usermod: no changes
Dec 06 02:59:27.088 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
Dec 06 02:59:27.100 INFO [stderr]      Running /target/debug/deps/nqueens_rs-26d1570f75d7a45b
Dec 06 02:59:27.108 INFO [stdout] 
Dec 06 02:59:27.108 INFO [stdout] running 0 tests
Dec 06 02:59:27.108 INFO [stdout] 
Dec 06 02:59:27.108 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 06 02:59:27.108 INFO [stdout] 
Dec 06 02:59:27.112 INFO [stderr] su: No module specific data is present
Dec 06 02:59:27.475 INFO running `"docker" "inspect" "60c223cd8a017ef16a7fa8333cd60f813a96210f0664600b7f53d1ac9de55dc8"`
Dec 06 02:59:27.688 INFO running `"docker" "rm" "-f" "60c223cd8a017ef16a7fa8333cd60f813a96210f0664600b7f53d1ac9de55dc8"`
Dec 06 02:59:27.863 INFO [stdout] 60c223cd8a017ef16a7fa8333cd60f813a96210f0664600b7f53d1ac9de55dc8