Missing docstring in predicate

[davidcok]

Dafny version

4.0.0+dev

Code to produce this issue

predicate p()
    // Always true. Every time.
    ensures p() == true
  { true }

Command to run and resulting output

In the AST the above predicate does not have a docstring.
Equivalent code with a /** */ comment does not have a docstring.
Equivalent code for a function is OK.
Equivalent code without a specification is OK.

What happened?

No docstring in the AST.

What type of operating system are you experiencing the problem on?

Mac