[INFO] cloning repository https://github.com/edzdez/letterboxed-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/edzdez/letterboxed-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedzdez%2Fletterboxed-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedzdez%2Fletterboxed-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 743733d77b2c38709488942059cc2b6f9eb6ea9e
[INFO] testing edzdez/letterboxed-solver against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fedzdez%2Fletterboxed-solver" "/workspace/builds/worker-27/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-27/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/edzdez/letterboxed-solver on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/edzdez/letterboxed-solver
[INFO] finished tweaking git repo https://github.com/edzdez/letterboxed-solver
[INFO] tweaked toml for git repo https://github.com/edzdez/letterboxed-solver written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate git repo https://github.com/edzdez/letterboxed-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 686ea8ac2ddf825d664029b32fb91e740e8efa6edeabcd12931991963e073056
[INFO] running `Command { std: "docker" "start" "-a" "686ea8ac2ddf825d664029b32fb91e740e8efa6edeabcd12931991963e073056", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "686ea8ac2ddf825d664029b32fb91e740e8efa6edeabcd12931991963e073056", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "686ea8ac2ddf825d664029b32fb91e740e8efa6edeabcd12931991963e073056", kill_on_drop: false }`
[INFO] [stdout] 686ea8ac2ddf825d664029b32fb91e740e8efa6edeabcd12931991963e073056
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d10e20eb3107fe849cd115e8afdbf4f72c6e4671cb58657dcd068f751f651e3
[INFO] running `Command { std: "docker" "start" "-a" "6d10e20eb3107fe849cd115e8afdbf4f72c6e4671cb58657dcd068f751f651e3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling letter-boxed-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `letters`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     letters: HashSet<char>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `contains_word`
[INFO] [stdout]   --> src/trie.rs:27:12
[INFO] [stdout]    |
[INFO] [stdout] 27 |     pub fn contains_word(&self, s: String) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/trie.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     value: Option<char>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `contains_char`
[INFO] [stdout]   --> src/trie.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn contains_char(&self, c: char) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `Command { std: "docker" "inspect" "6d10e20eb3107fe849cd115e8afdbf4f72c6e4671cb58657dcd068f751f651e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d10e20eb3107fe849cd115e8afdbf4f72c6e4671cb58657dcd068f751f651e3", kill_on_drop: false }`
[INFO] [stdout] 6d10e20eb3107fe849cd115e8afdbf4f72c6e4671cb58657dcd068f751f651e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f77b64fbdd1c1ca8aef60729ef10dd33e21bb8c6568263ea79c7e0b2448a82d
[INFO] running `Command { std: "docker" "start" "-a" "4f77b64fbdd1c1ca8aef60729ef10dd33e21bb8c6568263ea79c7e0b2448a82d", kill_on_drop: false }`
[INFO] [stderr]    Compiling letter-boxed-solver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `letters`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     letters: HashSet<char>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> src/trie.rs:83:5
[INFO] [stdout]    |
[INFO] [stdout] 83 |     value: Option<char>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `contains_char`
[INFO] [stdout]   --> src/trie.rs:97:12
[INFO] [stdout]    |
[INFO] [stdout] 97 |     pub fn contains_char(&self, c: char) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "4f77b64fbdd1c1ca8aef60729ef10dd33e21bb8c6568263ea79c7e0b2448a82d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f77b64fbdd1c1ca8aef60729ef10dd33e21bb8c6568263ea79c7e0b2448a82d", kill_on_drop: false }`
[INFO] [stdout] 4f77b64fbdd1c1ca8aef60729ef10dd33e21bb8c6568263ea79c7e0b2448a82d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3e63f5fa7897568337978196dbcdd27fd5fea0e9344fa43862ee2e9b7479f80f
[INFO] running `Command { std: "docker" "start" "-a" "3e63f5fa7897568337978196dbcdd27fd5fea0e9344fa43862ee2e9b7479f80f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: field is never read: `letters`
[INFO] [stderr]   --> src/main.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     letters: HashSet<char>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `value`
[INFO] [stderr]   --> src/trie.rs:83:5
[INFO] [stderr]    |
[INFO] [stderr] 83 |     value: Option<char>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `contains_char`
[INFO] [stderr]   --> src/trie.rs:97:12
[INFO] [stderr]    |
[INFO] [stderr] 97 |     pub fn contains_char(&self, c: char) -> bool {
[INFO] [stderr]    |            ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `letter-boxed-solver` (bin "letter-boxed-solver" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/letter_boxed_solver-00eefd09df21f0b3)
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test trie::test::trie_contains_string ... ok
[INFO] [stdout] test trie::test::trie_contains_string_but_not_substring ... ok
[INFO] [stdout] test trie::test::trie_does_not_contain_string ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "3e63f5fa7897568337978196dbcdd27fd5fea0e9344fa43862ee2e9b7479f80f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e63f5fa7897568337978196dbcdd27fd5fea0e9344fa43862ee2e9b7479f80f", kill_on_drop: false }`
[INFO] [stdout] 3e63f5fa7897568337978196dbcdd27fd5fea0e9344fa43862ee2e9b7479f80f