[perl #132044] returning inside whenever block causes MoarVM panic

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# New Ticket Created by  ugexe 
# Please include the string:  [perl #132044]
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# <URL: https://rt.perl.org/Ticket/Display.html?id=132044 >


The code below almost always results in "MoarVM panic: Internal error: Unwound 
entire stack and missed handler"
```
    sub ran-ok() {
        react {
            my $proc = Proc::Async.new("echo", "1”);
            whenever $proc.start { return 1; }
        }
    }
    ran-ok()
```