should be able to step over/out of the regex engine

[jsoref]

> bt
  in any call_with_capture at gen/moar/m-Metamodel.nqp line 3865
  in block  at perl6/rakudobrew/moar-nom/install/share/perl6/sources/AAC61C0EC6F88780427830443A057030CAA33846 (experimental) line 10
  in any enter at gen/moar/m-Metamodel.nqp line 3963
  in sub p2h at htmlify.p6 line 81
  in sub write-index-files at htmlify.p6 line 712
  in sub MAIN at htmlify.p6 line 147
  in block <unit> at htmlify.p6 line 881
> so
Not currently in a routine; cannot step out