- Added some improved debug-time display for synthesized locals
- Added some invariant checking regarding bound nodes.
- Move invocation of the spiller into LocalRewriter.Rewrite
- Add an error for when an expression tree contains a switch expression
- Made the local substituter apply at the top level in the expression spiller because expressions can now contain statements (BoundSpillSequence)
- Move the error ERR_ByRefTypeAndAwait to IteratorAndAsyncCaptureWalker
- Skip broken tests due to #25702