67d5435695
Fix missing lifetimes diagnostics after #83759 In #83759 while rebasing I didn't realize there was a new function for suggesting to add lifetime arguments. It relied on some invariants, namely that if a generic type/trait has angle brackets then it must have some generic argument, which is now no longer true. This PR updates that function to handle the new invariants. This also adds a new regression test but I'm not sure if that's the correct place for it. Fixes #85347
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.