[INFO] fetching crate metro-blackboard 0.0.0...
[INFO] checking metro-blackboard-0.0.0 against try#b6bca0d7327839b5e3f7a7779947cb9113d08917+rustflags=-Zstrict-projection-item-bounds for 150662-leaf
[INFO] extracting crate metro-blackboard 0.0.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate metro-blackboard 0.0.0
[INFO] finished tweaking crates.io crate metro-blackboard 0.0.0
[INFO] tweaked toml for crates.io crate metro-blackboard 0.0.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate metro-blackboard 0.0.0 on toolchain b6bca0d7327839b5e3f7a7779947cb9113d08917
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6bca0d7327839b5e3f7a7779947cb9113d08917" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6bca0d7327839b5e3f7a7779947cb9113d08917" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 18 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b6bca0d7327839b5e3f7a7779947cb9113d08917" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b6bca0d7327839b5e3f7a7779947cb9113d08917" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d242534f9e0977140861126f647fb77014625ef037b543000995d59fbd35d729
[INFO] running `Command { std: "docker" "start" "-a" "d242534f9e0977140861126f647fb77014625ef037b543000995d59fbd35d729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d242534f9e0977140861126f647fb77014625ef037b543000995d59fbd35d729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d242534f9e0977140861126f647fb77014625ef037b543000995d59fbd35d729", kill_on_drop: false }`
[INFO] [stdout] d242534f9e0977140861126f647fb77014625ef037b543000995d59fbd35d729
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Zstrict-projection-item-bounds" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+b6bca0d7327839b5e3f7a7779947cb9113d08917" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ddf2e80943a2ac37a34610fa80330314099c13053a2a1a3733c6a1ccfcedd14b
[INFO] running `Command { std: "docker" "start" "-a" "ddf2e80943a2ac37a34610fa80330314099c13053a2a1a3733c6a1ccfcedd14b", kill_on_drop: false }`
[INFO] [stderr]     Checking uuid v1.23.0
[INFO] [stderr]    Compiling metro-macros v0.0.0
[INFO] [stderr]     Checking metro-blackboard v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the trait bound `Tag: entity_traits::TypeTag` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `entity_traits::TypeTag` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 |     type TypeTag: TypeTag
[INFO] [stdout]    |                   ^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `TypeTag`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: entity_traits::TypeTag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Copy` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 |         + Copy
[INFO] [stdout]    |           ^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Copy`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::marker::Copy>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Ord` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Ord` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |         + Ord
[INFO] [stdout]    |           ^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Ord`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::cmp::Ord>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: TypeTag` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `TypeTag` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:14:19
[INFO] [stdout]    |
[INFO] [stdout] 14 |     type TypeTag: TypeTag
[INFO] [stdout]    |                   ^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `TypeTag`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: entity_traits::TypeTag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Hash` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Hash` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |         + std::hash::Hash
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Hash`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::hash::Hash>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Tag` doesn't implement `Debug`
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Debug` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:20:11
[INFO] [stdout]    |
[INFO] [stdout] 20 |         + std::fmt::Debug
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Debug`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::fmt::Debug>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: serde::Serialize` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Serialize` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout]    = note: for local types consider adding `#[derive(serde::Serialize)]` to your `Tag` type
[INFO] [stdout]    = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 |         + serde::Serialize
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Serialize`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: blackboard::_::_serde::Serialize>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Copy` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Copy` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:15:11
[INFO] [stdout]    |
[INFO] [stdout] 15 |         + Copy
[INFO] [stdout]    |           ^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Copy`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::marker::Copy>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: serde::de::DeserializeOwned` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `for<'de> Deserialize<'de>` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout]    = note: required for `Tag` to implement `DeserializeOwned`
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:22:11
[INFO] [stdout]    |
[INFO] [stdout] 22 |         + serde::de::DeserializeOwned;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Deserialize`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: for<'de> blackboard::_::_serde::Deserialize<'de>>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Ord` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Ord` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:18:11
[INFO] [stdout]    |
[INFO] [stdout] 18 |         + Ord
[INFO] [stdout]    |           ^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Ord`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::cmp::Ord>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: Hash` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Hash` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:19:11
[INFO] [stdout]    |
[INFO] [stdout] 19 |         + std::hash::Hash
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Hash`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::hash::Hash>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: `Tag` doesn't implement `Debug`
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Debug` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:20:11
[INFO] [stdout]    |
[INFO] [stdout] 20 |         + std::fmt::Debug
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Debug`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: std::fmt::Debug>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: serde::Serialize` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `Serialize` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout]    = note: for local types consider adding `#[derive(serde::Serialize)]` to your `Tag` type
[INFO] [stdout]    = note: for types from other crates check whether the crate offers a `serde` feature flag
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:21:11
[INFO] [stdout]    |
[INFO] [stdout] 21 |         + serde::Serialize
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Serialize`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: blackboard::_::_serde::Serialize>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Tag: serde::de::DeserializeOwned` is not satisfied
[INFO] [stdout]   --> src/entity_traits.rs:32:33
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag>: FromEntity<T, Tag> {
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ the trait `for<'de> Deserialize<'de>` is not implemented for `Tag`
[INFO] [stdout]    |
[INFO] [stdout]    = note: required for `Tag` to implement `DeserializeOwned`
[INFO] [stdout] note: required by a bound in `FromEntity`
[INFO] [stdout]   --> src/entity_traits.rs:22:11
[INFO] [stdout]    |
[INFO] [stdout] 22 |         + serde::de::DeserializeOwned;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^ required by this bound in `FromEntity`
[INFO] [stdout] ...
[INFO] [stdout] 27 | pub trait FromEntity<T, Tag>: EntityEnum<TypeTag = Tag> {
[INFO] [stdout]    |           ---------- required by a bound in this trait
[INFO] [stdout] help: consider restricting type parameter `Tag` with trait `Deserialize`
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub trait EnumDowncast<T, Tag: for<'de> blackboard::_::_serde::Deserialize<'de>>: FromEntity<T, Tag> {
[INFO] [stdout]    |                              ++++++++++++++++++++++++++++++++++++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metro-blackboard` (lib) due to 7 previous errors
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metro-blackboard` (lib test) due to 7 previous errors
[INFO] running `Command { std: "docker" "inspect" "ddf2e80943a2ac37a34610fa80330314099c13053a2a1a3733c6a1ccfcedd14b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ddf2e80943a2ac37a34610fa80330314099c13053a2a1a3733c6a1ccfcedd14b", kill_on_drop: false }`
[INFO] [stdout] ddf2e80943a2ac37a34610fa80330314099c13053a2a1a3733c6a1ccfcedd14b