Postcard scene deserialization does not provide readable error for unregistered types. #7337
Description
What you did
I was creating the tests listed in #7336.
During the testing, I was missing one of the .register_type() calls, which made all 4 of the backends fail to deserialize. The error messages were clear, except the one for postcard, which was less helpful.
What went wrong
The output for postcard is this:
Serde Deserialization Error
thread 'components::postcard_roundtrip_equality' panicked at 'Scene failed to deserialize: Serde Deserialization Error', tests/scenes/components.rs:61:37
stack backtrace:
Which is a lot less helpful than the output for ron, bincode, and messagepack:
no registration found for type `(i32, alloc::string::String, f32)`
thread 'components::bincode_roundtrip_equality' panicked at 'Scene failed to deserialize: no registration found for type `(i32, alloc::string::String, f32)`', tests/scenes/components.rs:94:37
stack backtrace:
I'd expect the output for "failing to deserialize because of a missing type registration" to be the same, regardless of the backend.
Additional information
To reproduce, comment out one of the .register_type calls in components.rs from this pull request: #7336. All 4 backends will fail to deserialize, but postcard will have a criptic message.