[bug #28275] Ranges like [a-z] incorrectly match in UTF systems

[Makar]

Follow-up Comment #2, bug #28275 (project grep):

No. It matches various non-ASCII symbols. Like 
ǹûṣőṏŭṋṽẚęčẉįļẹèĕểöâǩǝŏä

For example type (on UTF-8 system):

dd if=/dev/urandom bs=1024000 count=1 |iconv -c -f ucs-2 -t utf-8 >
random-symbols.txt

grep -oha '[a-z]' random-symbols.txt > 'random [a-z].txt'

and you'll see what I mean.

(file #19265, file #19266)
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Additional Item Attachment:

File name: random-symbols.txt             Size:169 KB
File name: random [a-z].txt               Size:0 KB


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