Regex loses identity when used in whatever code in module

[Leont]

The Problem

Given the following Foo.rakumod

my Regex $regex = /ab/;
subset Foo where * === $regex;
sub foo is export {
    say $regex ~~ Foo;
}

and the following script foo.raku:

use Foo;
foo();

$regex will lose its identity, and therefor not work as expected.

Expected Behavior

It should print True

Actual Behavior

It prints False

It wll print True if either:

1. The code is put in foo.raku itself
2. If $regex is made constant
3. If the WhateverCode is converted into a block { $^value == $regex }.

It is not affected by no precompilation;, and $regex.WHICH will return the same value inside and outside sub foo.

Environment

Welcome to Rakudo(tm) v2020.12.
Implementing the Raku(tm) programming language v6.d.
Built on MoarVM version 2020.12.