[perl #63396] And-assigning (&&=) True with False doesn't produce False or equiv

[Carl Mäsak]

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<jnthn> rakudo: my $x = True; $x &&= True; say $x;
<p6eval> rakudo 2a9382: OUTPUT«1␤»
<jnthn> rakudo: my $x = True; $x &&= False; say $x;
<p6eval> rakudo 2a9382: OUTPUT«1␤»
<jnthn> ...erm.
* jnthn summons masak
<masak> ta-daa!
<jnthn> masak: Hey look rakudobug!
<masak> ooh!
* masak submits

To be clear on what seems wrong here: the second evaluation should not
evaluate to 1, since True && False is False.