[perl #115374] [BUG] Spurious error when printing return value of DOC BEGIN block in Rakudo

[Carl Mäsak]

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<masak> r: say DOC BEGIN { 4 };
<p6eval> rakudo b86628: OUTPUT«===SORRY!===␤Method 'flat' not found
for invocant of class 'NQPMu'␤»
* masak submits rakudobug