decl macro 2.0 doesn't allow trailing comma

[bjorn3]

macro abc {
    () => {},

(Playground)

Errors:

   Compiling playground v0.0.1 (/playground)
error: unexpected end of macro invocation
 --> src/lib.rs:2:14
  |
2 |     () => {},
  |              ^ missing tokens in macro arguments

error: aborting due to previous error

error: Could not compile `playground`.

To learn more, run the command again with --verbose.

[matthewjasper]

But they do accept a trailing ;: https://play.rust-lang.org/?version=nightly&mode=debug&edition=2018&gist=f8bd2841ec49d0222be9ad6124bdd0a4

[bjorn3]

Maybe someone forgot to change the trailing ; into , when changing the separating ; into , in the (copied?) parse code?