metamodel role invocant compilation bug.

[coke]

The Problem

my method a(Metamodel::PrivateMethodContainer: $obj) { ... }

Expected Behavior

Compile successfully

Actual Behavior

===SORRY!===
Cannot find method 'coercive' on object of type Archetypes

Steps to Reproduce

Environment

https://gist.github.com/Whateverable/68c5c4fdb1a2b168437329a6dbfd36bb

Shows this behavior changed recently. (The snippet shown in whateverable just shows when the compilation error started happening, it's not enough to compile successfully once the error is fixed)

Discovered by automated compilation testing in the documentation repository.

[vrurg]

kaipei got there before me, Raku/nqp#694 should fix this issue when merged.

[vrurg]

Closing as Raku/nqp#694 has been merged and NQP version bumped since then.