From @masak

<TimToady> nr​: $_ = "foo bar"; say m/ "{ $_ }" /
<p6eval> niecza v22-13-g0d2a99e​: OUTPUT«#<match from(0) to(7) text(foo
bar) pos([].list) named({}.hash)>␤»
<p6eval> ..rakudo 7731d2​: OUTPUT«Null PMC access in
find_method('Stringy')␤ in regex [...]
< TimToady> ooh, rakudobug
* masak submits rakudobug

From @usev6

This looks good now​: It doesn't die anymore, but returns "foo bar".

$ perl6-m -e '$_ = "foo bar"; say m/ "{ $_ }" /'
｢foo bar｣

$ perl6-p -e '$_ = "foo bar"; say m/ "{ $_ }" /'
｢foo bar｣

$ perl6-j -e '$_ = "foo bar"; say m/ "{ $_ }" /'
｢foo bar｣

I added a test to S05-mass/rx.t with the following commit​: Raku/roast@98ef6a0163

The RT System itself - Status changed from 'new' to 'open'

@usev6 - Status changed from 'open' to 'resolved'