TypeError when compiling `readonly @prop` in c'tor

[bbrk24]

both of these work fine:

class Foo
  @(readonly bar)

class Foo
  @(@bar)

but you can't combine them.

[edemaine]

Isn't combining them kind of redundant? Doesn't @(readonly bar) already assign to this.bar (if using TypeScript)? I agree it would still be nice, though.

[bbrk24]

In that case, it should at least diagnose, rather than crashing the compiler.