[perl #117097] [BUG] say $!.WHAT fails in CATCH block

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<lue> r: try {die "42"; CATCH { say $!.WHAT }}
<p6eval> rakudo 8c0f87: OUTPUT«Can only use get_what on a 
SixModelObject␤ in block at /tmp/PZ5L6oW1y2:1␤ in block at 
/tmp/PZ5L6oW1y2:1␤␤»
* lue files rakudobug