[perl #62274] [TODO] Setting of caller module's $_ via $CALLER::_

[Carl Mäsak]

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Here's a minimal use case.

$ cat A.pm
use B;

say $_;
$ cat B.pm
$CALLER::_ = 42;
$ perl6 A.pm
Use of uninitialized value
$

I'd like for Rakudo to output 42 when running A.pm.