Handling forbidden combinations with except*

[jakkdl]

I'm not sure how pyright wants to deal with syntax errors in general, but pyright currently doesn't flag any of the forbidden combinations from PEP-654 https://peps.python.org/pep-0654/#forbidden-combinations (mypy flags all of them)

There's probably some scenarios where this might matter for typing, and in case users aren't running other linters it might be good if pyright notifies the user immediately.

[erictraut]

I agree that pyright should report these as syntax errors, consistent with the runtime. I'll convert this to an enhancement request.

[erictraut]

Here's a link to the enhancement request for reference.