Fix caching of dataclass subclass info

jcrist / msgspec

A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML

https://jcristharif.com/msgspec/

BSD 3-Clause "New" or "Revised" License

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Fix caching of dataclass subclass info #599

Closed jcrist closed 7 months ago

jcrist commented 7 months ago

Previously our caching mechanism would do the wrong thing when accessing type info on a dataclass subclass when the base class info was already cached. This fixes that so that decoding dataclass subclasses always works properly.

Fixes #598.