[INFO] fetching crate all-is-cubes-content 0.6.0...
[INFO] checking all-is-cubes-content-0.6.0 against master#385fa9d845dd326c6bbfd58c22244215e431948a for never-type-fallback-to-never
[INFO] extracting crate all-is-cubes-content 0.6.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate all-is-cubes-content 0.6.0 on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate all-is-cubes-content 0.6.0
[INFO] finished tweaking crates.io crate all-is-cubes-content 0.6.0
[INFO] tweaked toml for crates.io crate all-is-cubes-content 0.6.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 160 packages
[INFO] [stderr]       Adding all-is-cubes v0.6.0 (latest: v0.7.1)
[INFO] [stderr]       Adding all-is-cubes-ui v0.6.0 (latest: v0.7.0)
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[INFO] [stderr]       Adding indexmap v1.9.3 (latest: v2.2.6)
[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
[INFO] [stderr]       Adding itertools v0.11.0 (latest: v0.12.1)
[INFO] [stderr]       Adding noise v0.8.2 (latest: v0.9.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding ordered-float v3.9.2 (latest: v4.2.0)
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[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad0201b87755a5aee2b576d6fe540a1444febf1820a979671438a815b0ec31af
[INFO] running `Command { std: "docker" "start" "-a" "ad0201b87755a5aee2b576d6fe540a1444febf1820a979671438a815b0ec31af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad0201b87755a5aee2b576d6fe540a1444febf1820a979671438a815b0ec31af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad0201b87755a5aee2b576d6fe540a1444febf1820a979671438a815b0ec31af", kill_on_drop: false }`
[INFO] [stdout] ad0201b87755a5aee2b576d6fe540a1444febf1820a979671438a815b0ec31af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e5b1a5ed83c0592ad4463fd2de3060bb7db950d423730963a53e678052bce50
[INFO] running `Command { std: "docker" "start" "-a" "1e5b1a5ed83c0592ad4463fd2de3060bb7db950d423730963a53e678052bce50", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking either v1.10.0
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[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]    Compiling rustversion v1.0.14
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[INFO] [stderr]    Compiling serde_json v1.0.115
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling anyhow v1.0.81
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking flate2 v1.0.28
[INFO] [stderr]     Checking futures-util v0.3.30
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[INFO] [stderr]     Checking hashbrown v0.14.3
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[INFO] [stderr]    Compiling mutants v0.0.3
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[INFO] [stderr]     Checking embedded-graphics-core v0.4.0
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[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking clap_builder v4.5.2
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]     Checking fixedbitset v0.4.2
[INFO] [stderr]     Checking indexmap v2.2.6
[INFO] [stderr]    Compiling macro_rules_attribute-proc_macro v0.2.0
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[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling bytemuck_derive v1.6.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling exhaust-macros v0.1.1
[INFO] [stderr]    Compiling serde_repr v0.1.18
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[INFO] [stderr]    Compiling tokio-macros v2.2.0
[INFO] [stderr]     Checking exhaust v0.1.1
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[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]     Checking maze_generator v2.0.0
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking ordered-float v3.9.2
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[INFO] [stderr]     Checking all-is-cubes v0.6.0
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stderr]     Checking all-is-cubes-ui v0.6.0
[INFO] [stderr]     Checking all-is-cubes-content v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/exhibits.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/exhibits.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/385fa9d845dd326c6bbfd58c22244215e431948a/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grid` is never used
[INFO] [stdout]   --> src/dungeon/generic.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub trait Theme<R> {
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] 98 |     fn grid(&self) -> &DungeonGrid;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grid` is never used
[INFO] [stdout]   --> src/dungeon/generic.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub trait Theme<R> {
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] 98 |     fn grid(&self) -> &DungeonGrid;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.56s
[INFO] running `Command { std: "docker" "inspect" "1e5b1a5ed83c0592ad4463fd2de3060bb7db950d423730963a53e678052bce50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e5b1a5ed83c0592ad4463fd2de3060bb7db950d423730963a53e678052bce50", kill_on_drop: false }`
[INFO] [stdout] 1e5b1a5ed83c0592ad4463fd2de3060bb7db950d423730963a53e678052bce50
[INFO] checking all-is-cubes-content-0.6.0 against try#2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2 for never-type-fallback-to-never
[INFO] extracting crate all-is-cubes-content 0.6.0 into /workspace/builds/worker-7-tc2/source
[INFO] validating manifest of crates.io crate all-is-cubes-content 0.6.0 on toolchain 2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate all-is-cubes-content 0.6.0
[INFO] finished tweaking crates.io crate all-is-cubes-content 0.6.0
[INFO] tweaked toml for crates.io crate all-is-cubes-content 0.6.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 160 packages
[INFO] [stderr]       Adding all-is-cubes v0.6.0 (latest: v0.7.1)
[INFO] [stderr]       Adding all-is-cubes-ui v0.6.0 (latest: v0.7.0)
[INFO] [stderr]       Adding anes v0.1.6 (latest: v0.2.0)
[INFO] [stderr]       Adding approx v0.4.0 (latest: v0.5.1)
[INFO] [stderr]       Adding base64 v0.21.7 (latest: v0.22.0)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding fixedbitset v0.2.0 (latest: v0.5.6)
[INFO] [stderr]       Adding fixedbitset v0.4.2 (latest: v0.5.6)
[INFO] [stderr]       Adding getrandom v0.1.16 (latest: v0.2.12)
[INFO] [stderr]       Adding hashbrown v0.12.3 (latest: v0.14.3)
[INFO] [stderr]       Adding heck v0.4.1 (latest: v0.5.0)
[INFO] [stderr]       Adding image v0.24.9 (latest: v0.25.1)
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[INFO] [stderr]       Adding itertools v0.10.5 (latest: v0.12.1)
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[INFO] [stderr]       Adding noise v0.8.2 (latest: v0.9.0)
[INFO] [stderr]       Adding object v0.32.2 (latest: v0.34.0)
[INFO] [stderr]       Adding ordered-float v3.9.2 (latest: v4.2.0)
[INFO] [stderr]       Adding petgraph v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand v0.7.3 (latest: v0.8.5)
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[INFO] [stderr]       Adding rand_core v0.5.1 (latest: v0.6.4)
[INFO] [stderr]       Adding rand_hc v0.2.0 (latest: v0.3.2)
[INFO] [stderr]       Adding rand_xorshift v0.2.0 (latest: v0.3.0)
[INFO] [stderr]       Adding strum v0.25.0 (latest: v0.26.2)
[INFO] [stderr]       Adding strum_macros v0.25.3 (latest: v0.26.2)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (latest: v0.13.0+wasi-0.2.0)
[INFO] [stderr]       Adding yansi v0.5.1 (latest: v1.0.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 43e50e9bf77c02bae44f51ef51ad39d19b5f3ba1e443bea47dae8ea820feef03
[INFO] running `Command { std: "docker" "start" "-a" "43e50e9bf77c02bae44f51ef51ad39d19b5f3ba1e443bea47dae8ea820feef03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "43e50e9bf77c02bae44f51ef51ad39d19b5f3ba1e443bea47dae8ea820feef03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43e50e9bf77c02bae44f51ef51ad39d19b5f3ba1e443bea47dae8ea820feef03", kill_on_drop: false }`
[INFO] [stdout] 43e50e9bf77c02bae44f51ef51ad39d19b5f3ba1e443bea47dae8ea820feef03
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ae8055629ef178fa53671c88553be9db657cce30ddb6a7812e9b31472308867f
[INFO] running `Command { std: "docker" "start" "-a" "ae8055629ef178fa53671c88553be9db657cce30ddb6a7812e9b31472308867f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]     Checking simd-adler32 v0.3.7
[INFO] [stderr]     Checking futures-core v0.3.30
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling thiserror v1.0.58
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling syn v2.0.58
[INFO] [stderr]     Checking futures-sink v0.3.30
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]     Checking miniz_oxide v0.7.2
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]     Checking fdeflate v0.3.4
[INFO] [stderr]    Compiling cgmath v0.18.0
[INFO] [stderr]     Checking futures-channel v0.3.30
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking once_cell v1.19.0
[INFO] [stderr]    Compiling rayon-core v1.12.1
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[INFO] [stderr]     Checking ciborium-ll v0.2.2
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[INFO] [stderr]     Checking plotters-svg v0.3.5
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[INFO] [stderr]     Checking futures-executor v0.3.30
[INFO] [stderr]     Checking regex v1.10.4
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[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling bytemuck_derive v1.6.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.58
[INFO] [stderr]    Compiling exhaust-macros v0.1.1
[INFO] [stderr]    Compiling serde_repr v0.1.18
[INFO] [stderr]    Compiling strum_macros v0.25.3
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[INFO] [stderr]     Checking tokio v1.37.0
[INFO] [stderr]     Checking exhaust v0.1.1
[INFO] [stderr]     Checking bytemuck v1.15.0
[INFO] [stderr]     Checking maze_generator v2.0.0
[INFO] [stderr]     Checking image v0.24.9
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking ordered-float v3.9.2
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking all-is-cubes v0.6.0
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[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/exhibits.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `TryFrom` is imported redundantly
[INFO] [stdout]  --> src/exhibits.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::convert::TryFrom;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/2d84f2737f3bd9ebfcb07f75aa198d6cf7c715d2/library/std/src/prelude/mod.rs:148:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `TryFrom` is already defined here
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grid` is never used
[INFO] [stdout]   --> src/dungeon/generic.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub trait Theme<R> {
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] 98 |     fn grid(&self) -> &DungeonGrid;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `grid` is never used
[INFO] [stdout]   --> src/dungeon/generic.rs:98:8
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub trait Theme<R> {
[INFO] [stdout]    |           ----- method in this trait
[INFO] [stdout] 98 |     fn grid(&self) -> &DungeonGrid;
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.92s
[INFO] running `Command { std: "docker" "inspect" "ae8055629ef178fa53671c88553be9db657cce30ddb6a7812e9b31472308867f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae8055629ef178fa53671c88553be9db657cce30ddb6a7812e9b31472308867f", kill_on_drop: false }`
[INFO] [stdout] ae8055629ef178fa53671c88553be9db657cce30ddb6a7812e9b31472308867f