t / t4101 / diff.1-3on commit grep: fix segfault under -P + PCRE2 <=10.30 + (*NO_JIT) (a25b908)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,3 +1,3 @@
   4 a
   5-b
   6 c
   7+b
   8\ No newline at end of file