grep 3.3 I get a few weird symbols (seems valid utf-8), along with normal numbers with the following simple snippet (.UTF-8 and .utf8 result in same, even .UtF---8 is the same): LC_ALL=en_US.UTF-8 grep -o "[0-9]" -a /dev/urandom|head -n 1024|tr -d "\n" wc -c counts 1047 and and 1033 and 1036 etc, so they're multi-byte characters meanwhile, with LC_ALL being C.UTF-8 this is not the case, LC_ALL=C.UTF-8 grep -o "[0-9]" -a /dev/urandom|head -n 1024|tr -d "\n"|wc -c consistently results in 1024 characters/bytes, as it's supposed to be... it's not just en_US, it seems ANY utf-8 locale, other than C results in this bug, whereas non-utf8 versions are fine, bare en_US doesn't show this bug, nor does en_US.iso88591...
worthy of note is that [[:digit:]] works correctly, while [0-9] does not (and 1-9 is same bug as 0-9, if you were wondering), setting -E doesn't change anything either...
