id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
5225	grep-3.9	Bruce Dubbs	lfs-book	"New minor version.

Noteworthy changes in release 3.9 (2023-03-05) [stable]

Bug fixes

- With -P, some non-ASCII UTF8 characters were not recognized as
  word-constituent due to our omission of the PCRE2_UCP flag. E.g.,
  given f(){ echo Perú|LC_ALL=en_US.UTF-8 grep -Po ""$1""; } and
  this command, echo $(f 'r\w'):$(f '.\b'), before it would print "":r"".
  After the fix, it prints the correct results: ""rú:ú"".

- When given multiple patterns the last of which has a back-reference,
  grep no longer sometimes mistakenly matches lines in some cases."	enhancement	closed	normal	12.0	Book	git	normal	fixed