bugs to work on

What is the best procedure for pickings some clang bugs to work on?

I'd like to know that it's already been decided that it's a bug but maybe nobody has time to work on it.

I'm mostly interested in fixing language conformance issues rather than general clang cleanup but it would depend on the bug.

And if we decide to work on a bug, do we just assign it to ourselves?

What is the best procedure for pickings some clang bugs to work on?

I'd like to know that it's already been decided that it's a bug but
maybe nobody has time to work on it.

I don't think there's any field in our Bugzilla configuration that
reflects this status.

I'm mostly interested in fixing language conformance issues rather than
general clang cleanup but it would depend on the bug.

A few of the Bugzilla keywords that might interest you would be:

accepts-invalid
compile-fail (this includes rejects-valid)
crash-on-invalid

And if we decide to work on a bug, do we just assign it to ourselves?

That's usually the way to go, yes.