これこの前ここで書いた <# aaa #> のバグの修正かな https://github.com/apple/swift/pull/13480

[4.1][Parse] Disable token receiver while parsing types in editor placeholder by rintaro · Pull Request #13480 · apple/swift

Explanation: The parser has TokReceiver for recording consumed tokens used by SourceKit. When the parser parses types in editor placeholder (e.g. '<#T##String#>'), it should stop the recording so i...