https://sourceware.org/bugzilla/show_bug.cgi?id=23036 --- Comment #8 from jim at meyering dot net <jim at meyering dot net> --- FYI, this now works for me on Fedora 28: $ echo 'á' | LC_ALL=en_US.UTF-8 grep '[[=a=]]' á -- You are receiving this mail because: You are on the CC list for the bug.