As all the bugs in this bug report appear to be fixed, I'm closing it now.
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Paul Eggert
- bug#22655: grep -Pz '^' now fails! Aaron Crane
- bug#22655: grep -Pz '^' now fails! Paul Eggert
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Paul Eggert
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Paul Eggert
- bug#22655: grep -Pz '^' now fails! Paul Eggert
- bug#22655: grep -Pz '^' now fails! Stephane Chazelas
- bug#22655: grep -Pz '^' now fails! Paul Eggert