[perl #116370] [BUG] a macro with $_ as an argument doesn't work in a statement_mod 'for' loop in Rakudo

[Carl Mäsak]

# New Ticket Created by  "Carl Mäsak" 
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<quester> rn: macro postfix:<!>($n) { quasi { {{{$n}}}+1 } } ; say $_! for 3..5;
<p6eval> ..rakudo c3f565: OUTPUT«use of uninitialized variable $_ of
type Any in numeric context␤1␤use of uninitialized variable $_ of type
Any in numeric context␤1␤use of uninitialized variable $_ of type Any
in numeric context␤1␤»
<quester> rn: macro postfix:<!>($n) { quasi { {{{$n}}}+1 } } ; for
3..5 {say $_!};
<+p6eval> rakudo c3f565: OUTPUT«4␤5␤6␤»
* quester agrees that this is enough spam, but idly wonders if this is
a rakudo bug
<masak> quester: yes, that looks like a rakudobug.
* masak submits

I *think* this is buggy behavior, and that the first result should
equal the second one. Will need to think a bit deeper about it to be
sure, though.