leaking NQPMu when coercion failed

[gfldex]

class A {

}

class C {
    has A() $.attr is required;
}

my $c4 = C.new: attr => 42;

output:

Impossible coercion from 'Int' into 'A': method new returned a type object NQPMu
  in block <unit> at /home/dex/projects/raku/rakudobug/tmp.raku line 9

As vrurg stated on Reddit, NQPMu should not leak into user-land.

Environment

• Operating system: Linux dexhome 5.15.0-2-amd64 cc1: error: unrecognized command line option "-Wjump-missed-init" #1 SMP Debian 5.15.5-1 (2021-11-26) x86_64 GNU/Linux
• Compiler version (perl6 -v or raku -v): Welcome to Rakudo™ v2022.06-33-g6dc2f92c9. Implementing the Raku® Programming Language v6.d. Built on MoarVM version 2022.06-2-gcc49dcf93.

[vrurg]

It looks like the bug has been fixed somewhere along the way of implementing new-disp version of coercion. Could you, please, check it out with the latest master?

[vrurg]

Closing as not reproducible on the master anymore.

[melezhik]

How to check this? My r3 test still shows the error message on the latest commit - https://gistcdn.githack.com/melezhik/eae4aef3bd23eec25ddb2cb80635fe45/raw/372c833d42ea60c5a1d222dc8277b45997fb3bbc/report.html

[vrurg]

That error is expected because Int is not coercible into A. The original problem was about the error message in which NQPMu was leaking. Now it produces correct error because there is no method.