LLMs are so bad for coding.
Copilot: `NullabilityInfoContext` is thread‑safe. [...] The internal cache is thread‑safe.
The .NET documentation: This type is not thread safe. [...] methods can't be called concurrently from multiple threads, as they use a non-concurrent cache internally.
(My code confirms that `NullabilityInfoContext` is NOT thread‑safe)




