Color type names for "Unknown type _"

[rndnoise]

I had a somewhat confusing error shown by psa:

Unknown type Error

I thought this was some "the impossible happened" kind of message, but it was because I referred to "Error" in my code without importing it. To troubleshoot I compiled without using psa and saw that psc did highlight the word "Error". Could psa be changed to do the same?

[natefaubion]

The compiler would have to preserve the highlight regions when using the JSON output so other tools could consume it.