t / t4013 / diff.diff-tree_--root_-r_--abbrev_initialon commit grep: fix segfault under -P + PCRE2 <=10.30 + (*NO_JIT) (a25b908)
   1$ git diff-tree --root -r --abbrev initial
   2444ac553ac7612cc88969031b02b3767fb8a353a
   3:000000 100644 0000000... 35d242b... A  dir/sub
   4:000000 100644 0000000... 01e79c3... A  file0
   5:000000 100644 0000000... 01e79c3... A  file2
   6$