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

[Norihirio Tanaka]

Follow-up Comment #6, bug #28275 (project grep):

The testcase gave me the following results.

% dd if=/dev/urandom bs=1024 count=1024 
| iconv -c -f ucs-2 -t utf-8 
| LANG=en_US.UTF8 grep -oha '[a-z]' 
| hexdump -C 
| sed -e 's/^[^ ]*//; s/|.*//; s/ 0a/
/g' 
| sed -e 's/^ *//; s/  */ /g; /^$/d'

c5 a3
c5 b7
c5 ad
77
c4 81
c4 89
c5 9b
68
c2 aa
c5 b5
c4 a7
c3
a8
c5 a9
c3 a6
c4 b8
c3 ae
78
c4 ab
c3 a4
c3 a3
c5 9b
c3 bd

Though I don't know what character "c5 a3", "c5 b7", "c5 ad",
etc show, this behavior is designed in glibc.


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