Calling user defined function in abstract constraint produces "function does not exist"

[dnwpark]

Given the schema:

  function my_check(val: str) -> bool {
    using (
      contains(val,'a')
    );
  }
  abstract constraint bad_constraint(blah: str) {
      using (my_check(blah));
  }

The following error is produced:

edgedb error: InvalidReferenceError: function 'default::my_check' does not exist

[dnwpark]

Possibly related error happens when using a global in a constraint

  global blah := 'blah';

  abstract constraint bad_constraint(val: str) {
      using (val = default::blah);
  }

error: object type or alias 'default::blah' does not exist
   │
19 │       using (val = default::blah);
   │                    ^^^^^^^^^^^^^ did you mean 'default::blah'?