Dec 18 03:30:43.575 INFO checking bastikr/wordacademy-solver against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 03:30:43.575 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/bastikr/wordacademy-solver:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 03:30:43.721 INFO [stdout] 666268480d71137afdc223d35e5b34383cd174b39744b65f191f62e1fef6a818
Dec 18 03:30:43.723 INFO running `"docker" "start" "-a" "666268480d71137afdc223d35e5b34383cd174b39744b65f191f62e1fef6a818"`
Dec 18 03:30:44.181 INFO [stderr]     Checking wordacademy-solver v0.1.0 (/opt/crater/workdir)
Dec 18 03:30:44.348 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 03:30:44.348 INFO [stderr]  --> src/chargraph.rs:1:5
Dec 18 03:30:44.348 INFO [stderr]   |
Dec 18 03:30:44.348 INFO [stderr] 1 | use std::collections::HashMap;
Dec 18 03:30:44.348 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.348 INFO [stderr]   |
Dec 18 03:30:44.348 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 03:30:44.348 INFO [stderr] 
Dec 18 03:30:44.404 INFO [stderr] warning: unused import: `Mask`
Dec 18 03:30:44.404 INFO [stderr]    --> src/board.rs:245:29
Dec 18 03:30:44.404 INFO [stderr]     |
Dec 18 03:30:44.404 INFO [stderr] 245 |     use board::{Neighbours, Mask};
Dec 18 03:30:44.404 INFO [stderr]     |                             ^^^^
Dec 18 03:30:44.404 INFO [stderr]     |
Dec 18 03:30:44.404 INFO [stderr]     = note: #[warn(unused_imports)] on by default
Dec 18 03:30:44.404 INFO [stderr] 
Dec 18 03:30:44.404 INFO [stderr] warning: unused import: `std::collections::HashMap`
Dec 18 03:30:44.404 INFO [stderr]  --> src/chargraph.rs:1:5
Dec 18 03:30:44.404 INFO [stderr]   |
Dec 18 03:30:44.404 INFO [stderr] 1 | use std::collections::HashMap;
Dec 18 03:30:44.404 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.404 INFO [stderr] 
Dec 18 03:30:44.540 INFO [stderr] warning: unused variable: `index`
Dec 18 03:30:44.540 INFO [stderr]   --> src/chargraph.rs:73:17
Dec 18 03:30:44.540 INFO [stderr]    |
Dec 18 03:30:44.540 INFO [stderr] 73 |             Err(index) => { panic!("bla") }
Dec 18 03:30:44.540 INFO [stderr]    |                 ^^^^^ help: consider using `_index` instead
Dec 18 03:30:44.540 INFO [stderr]    |
Dec 18 03:30:44.540 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 03:30:44.540 INFO [stderr] 
Dec 18 03:30:44.609 INFO [stderr] warning: unused variable: `graph`
Dec 18 03:30:44.609 INFO [stderr]   --> src/chargraph.rs:97:13
Dec 18 03:30:44.609 INFO [stderr]    |
Dec 18 03:30:44.609 INFO [stderr] 97 |         let graph = CharGraph::from_strings(&words);
Dec 18 03:30:44.609 INFO [stderr]    |             ^^^^^ help: consider using `_graph` instead
Dec 18 03:30:44.609 INFO [stderr]    |
Dec 18 03:30:44.609 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 03:30:44.609 INFO [stderr] 
Dec 18 03:30:44.609 INFO [stderr] warning: unused variable: `index`
Dec 18 03:30:44.609 INFO [stderr]   --> src/chargraph.rs:73:17
Dec 18 03:30:44.609 INFO [stderr]    |
Dec 18 03:30:44.609 INFO [stderr] 73 |             Err(index) => { panic!("bla") }
Dec 18 03:30:44.609 INFO [stderr]    |                 ^^^^^ help: consider using `_index` instead
Dec 18 03:30:44.609 INFO [stderr] 
Dec 18 03:30:44.619 INFO [stderr] warning: function is never used: `writeable`
Dec 18 03:30:44.619 INFO [stderr]    --> src/solver_positional.rs:515:1
Dec 18 03:30:44.619 INFO [stderr]     |
Dec 18 03:30:44.619 INFO [stderr] 515 | fn writeable(word: &str, board: &Board) -> bool {
Dec 18 03:30:44.619 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.619 INFO [stderr]     |
Dec 18 03:30:44.619 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 18 03:30:44.619 INFO [stderr] 
Dec 18 03:30:44.624 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.624 INFO [stderr]   --> src/board.rs:66:9
Dec 18 03:30:44.624 INFO [stderr]    |
Dec 18 03:30:44.624 INFO [stderr] 66 |         writeln!(f);
Dec 18 03:30:44.624 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 18 03:30:44.624 INFO [stderr]    |
Dec 18 03:30:44.624 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 03:30:44.624 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.624 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 18 03:30:44.624 INFO [stderr] 
Dec 18 03:30:44.624 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.624 INFO [stderr]   --> src/board.rs:68:13
Dec 18 03:30:44.624 INFO [stderr]    |
Dec 18 03:30:44.624 INFO [stderr] 68 |             writeln!(f, "{}", separator);
Dec 18 03:30:44.624 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.624 INFO [stderr]    |
Dec 18 03:30:44.624 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.624 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 18 03:30:44.624 INFO [stderr] 
Dec 18 03:30:44.624 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.624 INFO [stderr]   --> src/board.rs:70:17
Dec 18 03:30:44.624 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr] 70 |                 write!(f, "|");
Dec 18 03:30:44.625 INFO [stderr]    |                 ^^^^^^^^^^^^^^^
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.625 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 18 03:30:44.625 INFO [stderr] 
Dec 18 03:30:44.625 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.625 INFO [stderr]   --> src/board.rs:72:21
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr] 72 |                     write!(f, "{}", self.get(i, j));
Dec 18 03:30:44.625 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.625 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 18 03:30:44.625 INFO [stderr] 
Dec 18 03:30:44.625 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.625 INFO [stderr]   --> src/board.rs:74:21
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr] 74 |                     write!(f, " ");
Dec 18 03:30:44.625 INFO [stderr]    |                     ^^^^^^^^^^^^^^^
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.625 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 18 03:30:44.625 INFO [stderr] 
Dec 18 03:30:44.625 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.625 INFO [stderr]   --> src/board.rs:77:13
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr] 77 |             writeln!(f, "|");
Dec 18 03:30:44.625 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.625 INFO [stderr]    |
Dec 18 03:30:44.625 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.625 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 18 03:30:44.625 INFO [stderr] 
Dec 18 03:30:44.708 INFO [stderr] warning: function is never used: `writeable`
Dec 18 03:30:44.708 INFO [stderr]    --> src/solver_positional.rs:515:1
Dec 18 03:30:44.708 INFO [stderr]     |
Dec 18 03:30:44.708 INFO [stderr] 515 | fn writeable(word: &str, board: &Board) -> bool {
Dec 18 03:30:44.708 INFO [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.708 INFO [stderr]     |
Dec 18 03:30:44.708 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 18 03:30:44.708 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:66:9
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 66 |         writeln!(f);
Dec 18 03:30:44.709 INFO [stderr]    |         ^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:68:13
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 68 |             writeln!(f, "{}", separator);
Dec 18 03:30:44.709 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:70:17
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 70 |                 write!(f, "|");
Dec 18 03:30:44.709 INFO [stderr]    |                 ^^^^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:72:21
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 72 |                     write!(f, "{}", self.get(i, j));
Dec 18 03:30:44.709 INFO [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:74:21
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 74 |                     write!(f, " ");
Dec 18 03:30:44.709 INFO [stderr]    |                     ^^^^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.709 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 03:30:44.709 INFO [stderr]   --> src/board.rs:77:13
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr] 77 |             writeln!(f, "|");
Dec 18 03:30:44.709 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^
Dec 18 03:30:44.709 INFO [stderr]    |
Dec 18 03:30:44.709 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 03:30:44.709 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 18 03:30:44.709 INFO [stderr] 
Dec 18 03:30:44.898 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
Dec 18 03:30:45.162 INFO running `"docker" "inspect" "666268480d71137afdc223d35e5b34383cd174b39744b65f191f62e1fef6a818"`
Dec 18 03:30:45.267 INFO running `"docker" "rm" "-f" "666268480d71137afdc223d35e5b34383cd174b39744b65f191f62e1fef6a818"`
Dec 18 03:30:45.357 INFO [stdout] 666268480d71137afdc223d35e5b34383cd174b39744b65f191f62e1fef6a818