[INFO] cloning repository https://github.com/sts10/advent-of-code-2018
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sts10/advent-of-code-2018" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsts10%2Fadvent-of-code-2018", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsts10%2Fadvent-of-code-2018'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 749149d5dd3fec7f50af6c186c64fae199e3643b
[INFO] building sts10/advent-of-code-2018 against master#881c1ac408d93bb7adaa3a51dabab9266e82eee8 for issue-85264
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsts10%2Fadvent-of-code-2018" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sts10/advent-of-code-2018 on toolchain 881c1ac408d93bb7adaa3a51dabab9266e82eee8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sts10/advent-of-code-2018
[INFO] finished tweaking git repo https://github.com/sts10/advent-of-code-2018
[INFO] tweaked toml for git repo https://github.com/sts10/advent-of-code-2018 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sts10/advent-of-code-2018 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57c5eb17fcad7f41e5fd4c71ac19428307fcf6d7b668c301d226376df4d1e972
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "57c5eb17fcad7f41e5fd4c71ac19428307fcf6d7b668c301d226376df4d1e972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57c5eb17fcad7f41e5fd4c71ac19428307fcf6d7b668c301d226376df4d1e972", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57c5eb17fcad7f41e5fd4c71ac19428307fcf6d7b668c301d226376df4d1e972", kill_on_drop: false }`
[INFO] [stdout] 57c5eb17fcad7f41e5fd4c71ac19428307fcf6d7b668c301d226376df4d1e972
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+881c1ac408d93bb7adaa3a51dabab9266e82eee8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8888ec8a3bc52dd8d1824e71b9258ff42e4f0386d0128c3a51fd9382bbadc81f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8888ec8a3bc52dd8d1824e71b9258ff42e4f0386d0128c3a51fd9382bbadc81f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.44
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]    Compiling time v0.1.40
[INFO] [stderr]    Compiling chrono v0.4.6
[INFO] [stderr]    Compiling advent-of-code-2018-reorganized v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable `the_char_to_remove_that_resulted_in_shortest_polymer_result` is assigned to, but never used
[INFO] [stdout]   --> src/bin/my_slow_day05.rs:19:13
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let mut the_char_to_remove_that_resulted_in_shortest_polymer_result: char;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout]    = note: consider using `_the_char_to_remove_that_resulted_in_shortest_polymer_result` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `the_char_to_remove_that_resulted_in_shortest_polymer_result` is never read
[INFO] [stdout]   --> src/bin/my_slow_day05.rs:45:13
[INFO] [stdout]    |
[INFO] [stdout] 45 |             the_char_to_remove_that_resulted_in_shortest_polymer_result = *char_to_remove;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `indexes_to_remove`
[INFO] [stdout]   --> src/bin/my_slow_day05.rs:60:17
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut indexes_to_remove: Vec<usize> = vec![];
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_indexes_to_remove`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/my_slow_day05.rs:60:13
[INFO] [stdout]    |
[INFO] [stdout] 60 |         let mut indexes_to_remove: Vec<usize> = vec![];
[INFO] [stdout]    |             ----^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `new_grid`
[INFO] [stdout]   --> src/bin/day06.rs:32:21
[INFO] [stdout]    |
[INFO] [stdout] 32 |                 let new_grid = spread(x, y, grid);
[INFO] [stdout]    |                     ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_grid`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `square` is never read
[INFO] [stdout]   --> src/bin/day06.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 51 |             "." => square = sign,
[INFO] [stdout]    |                    ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `square`
[INFO] [stdout]   --> src/bin/day06.rs:51:20
[INFO] [stdout]    |
[INFO] [stdout] 49 |     for square in nine_squares {
[INFO] [stdout]    |         ------
[INFO] [stdout]    |         |
[INFO] [stdout]    |         first assignment to `square`
[INFO] [stdout]    |         help: consider making this binding mutable: `mut square`
[INFO] [stdout] 50 |         match square {
[INFO] [stdout] 51 |             "." => square = sign,
[INFO] [stdout]    |                    ^^^^^^^^^^^^^ cannot assign twice to immutable variable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0384`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `advent-of-code-2018-reorganized`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `guards`
[INFO] [stdout]   --> src/bin/day04_bad_attempt.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::new();
[INFO] [stdout]    |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_guards`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/bin/day04_bad_attempt.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut guards: HashMap<usize, Guard> = HashMap::new();
[INFO] [stdout]    |         ----^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8888ec8a3bc52dd8d1824e71b9258ff42e4f0386d0128c3a51fd9382bbadc81f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8888ec8a3bc52dd8d1824e71b9258ff42e4f0386d0128c3a51fd9382bbadc81f", kill_on_drop: false }`
[INFO] [stdout] 8888ec8a3bc52dd8d1824e71b9258ff42e4f0386d0128c3a51fd9382bbadc81f
