i <@> leave[t1] vKP/REFC ->(end) 1 <0> enter ->2 2 <;> nextstate(main 5 qr.pl:1) v ->3 5 <2> sassign vKS/2 ->6 3 qr(/./) s ->4 - <1> ex-rv2sv sKRM*/1 ->5 4 <> gvsv s ->5 6 <;> nextstate(main 5 qr.pl:2) v ->7 >> Here you see the $qr =~ m/$qr/ form b match() vKS ->c - <1> ex-rv2sv sK/1 ->8 7 <> gvsv s ->8 a <|> regcomp(other->b) sK/1 ->b 8 <1> regcreset sK/1 ->9 - <1> ex-rv2sv sK/1 ->a 9 <> gvsv s ->a >> And here you see the $qr =~ $qr form c <;> nextstate(main 5 qr.pl:3) v ->d h match() vKS ->i - <1> ex-rv2sv sK/1 ->e d <> gvsv s ->e g <|> regcomp(other->h) sK/1 ->h e <1> regcreset sK/1 ->f - <1> ex-rv2sv sK/1 ->g f <> gvsv s ->g