[INFO] cloning repository https://github.com/Benestar/rust-model-checker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Benestar/rust-model-checker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenestar%2Frust-model-checker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenestar%2Frust-model-checker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b78e96efaa5de18e95e5cfcd546ef98512bb2b8d
[INFO] testing Benestar/rust-model-checker against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBenestar%2Frust-model-checker" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Benestar/rust-model-checker on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Benestar/rust-model-checker
[INFO] finished tweaking git repo https://github.com/Benestar/rust-model-checker
[INFO] tweaked toml for git repo https://github.com/Benestar/rust-model-checker written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/Benestar/rust-model-checker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5d38a97d213ae64e5d82d5fe5f3f0e2f7e8892f83ed8663817fb7b458e4e0ae8
[INFO] running `Command { std: "docker" "start" "-a" "5d38a97d213ae64e5d82d5fe5f3f0e2f7e8892f83ed8663817fb7b458e4e0ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5d38a97d213ae64e5d82d5fe5f3f0e2f7e8892f83ed8663817fb7b458e4e0ae8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d38a97d213ae64e5d82d5fe5f3f0e2f7e8892f83ed8663817fb7b458e4e0ae8", kill_on_drop: false }`
[INFO] [stdout] 5d38a97d213ae64e5d82d5fe5f3f0e2f7e8892f83ed8663817fb7b458e4e0ae8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5e9ae767aafecd173aa55d96fe9f2b7f046475b25b6096ab65aae22da5bed37
[INFO] running `Command { std: "docker" "start" "-a" "f5e9ae767aafecd173aa55d96fe9f2b7f046475b25b6096ab65aae22da5bed37", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-model-checker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     trans: Box<Fn(&Q, &S) -> HashSet<Q>>,
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q, &S) -> HashSet<Q>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     accepting: Box<Fn(&Q) -> bool>,
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q) -> bool`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `initial`
[INFO] [stdout]   --> src/buechi.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     initial: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trans`
[INFO] [stdout]   --> src/buechi.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     trans: HashSet<(Q, S, Q)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `accepting`
[INFO] [stdout]   --> src/buechi.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     accepting: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
[INFO] running `Command { std: "docker" "inspect" "f5e9ae767aafecd173aa55d96fe9f2b7f046475b25b6096ab65aae22da5bed37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5e9ae767aafecd173aa55d96fe9f2b7f046475b25b6096ab65aae22da5bed37", kill_on_drop: false }`
[INFO] [stdout] f5e9ae767aafecd173aa55d96fe9f2b7f046475b25b6096ab65aae22da5bed37
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 89224bc72b83b93da72522144c97bce937f103b9e2e1fe95fde5a320e6158979
[INFO] running `Command { std: "docker" "start" "-a" "89224bc72b83b93da72522144c97bce937f103b9e2e1fe95fde5a320e6158979", kill_on_drop: false }`
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     trans: Box<Fn(&Q, &S) -> HashSet<Q>>,
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q, &S) -> HashSet<Q>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     accepting: Box<Fn(&Q) -> bool>,
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q) -> bool`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `initial`
[INFO] [stdout]   --> src/buechi.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     initial: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trans`
[INFO] [stdout]   --> src/buechi.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     trans: HashSet<(Q, S, Q)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `accepting`
[INFO] [stdout]   --> src/buechi.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     accepting: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rust-model-checker v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:6:16
[INFO] [stdout]   |
[INFO] [stdout] 6 |     trans: Box<Fn(&Q, &S) -> HashSet<Q>>,
[INFO] [stdout]   |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q, &S) -> HashSet<Q>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> src/buechi.rs:7:20
[INFO] [stdout]   |
[INFO] [stdout] 7 |     accepting: Box<Fn(&Q) -> bool>,
[INFO] [stdout]   |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q) -> bool`
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `initial`
[INFO] [stdout]   --> src/buechi.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     initial: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `trans`
[INFO] [stdout]   --> src/buechi.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 |     trans: HashSet<(Q, S, Q)>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `accepting`
[INFO] [stdout]   --> src/buechi.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     accepting: HashSet<Q>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "89224bc72b83b93da72522144c97bce937f103b9e2e1fe95fde5a320e6158979", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89224bc72b83b93da72522144c97bce937f103b9e2e1fe95fde5a320e6158979", kill_on_drop: false }`
[INFO] [stdout] 89224bc72b83b93da72522144c97bce937f103b9e2e1fe95fde5a320e6158979
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bc9d78dfe0bc5ccaef1f1383c788148b4be57f0f57a8b45dcec1e5726938c6c2
[INFO] running `Command { std: "docker" "start" "-a" "bc9d78dfe0bc5ccaef1f1383c788148b4be57f0f57a8b45dcec1e5726938c6c2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/buechi.rs:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 |     trans: Box<Fn(&Q, &S) -> HashSet<Q>>,
[INFO] [stderr]   |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q, &S) -> HashSet<Q>`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/buechi.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |     accepting: Box<Fn(&Q) -> bool>,
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q) -> bool`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `initial`
[INFO] [stderr]   --> src/buechi.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     initial: HashSet<Q>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `trans`
[INFO] [stderr]   --> src/buechi.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     trans: HashSet<(Q, S, Q)>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `accepting`
[INFO] [stderr]   --> src/buechi.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     accepting: HashSet<Q>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/buechi.rs:6:16
[INFO] [stderr]   |
[INFO] [stderr] 6 |     trans: Box<Fn(&Q, &S) -> HashSet<Q>>,
[INFO] [stderr]   |                ^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q, &S) -> HashSet<Q>`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/buechi.rs:7:20
[INFO] [stderr]   |
[INFO] [stderr] 7 |     accepting: Box<Fn(&Q) -> bool>,
[INFO] [stderr]   |                    ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(&Q) -> bool`
[INFO] [stderr]   |
[INFO] [stderr]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stderr]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `initial`
[INFO] [stderr]   --> src/buechi.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     initial: HashSet<Q>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `trans`
[INFO] [stderr]   --> src/buechi.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     trans: HashSet<(Q, S, Q)>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `accepting`
[INFO] [stderr]   --> src/buechi.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     accepting: HashSet<Q>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.52s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_model_checker-675dc2cc02c404b7)
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test ltl::tests::ltl_fmt ... ok
[INFO] [stdout] test ltl::lexer::tests::test_lexer ... ok
[INFO] [stdout] test ltl::tests::ltl_nnf_subformulas ... ok
[INFO] [stdout] test ltl::tests::ltl_subformulas ... ok
[INFO] [stdout] test ltl::parser::tests::test_parse ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/nnf-202cf11ee8120b31)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rust-model-checker
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bc9d78dfe0bc5ccaef1f1383c788148b4be57f0f57a8b45dcec1e5726938c6c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc9d78dfe0bc5ccaef1f1383c788148b4be57f0f57a8b45dcec1e5726938c6c2", kill_on_drop: false }`
[INFO] [stdout] bc9d78dfe0bc5ccaef1f1383c788148b4be57f0f57a8b45dcec1e5726938c6c2