This program 
use utf8;  chr(192) =~ /\w/;

[download]
tells me "Malformed UTF-8 character (unexpected non-continuation byte 0x00 after start byte 0xc0) in pattern match (m//)"

As documented in perlfunc, chr seems to take Unicode characters just fine, producing legal UTF-8 for most values, but for some reason is working wrong for arguments in the range 191 through 255.

Here is more proof: 

foreach (90, 192, 257, 0x263a) { print "$_ - ", join ('.',unpack('C*',
+chr($_))),"\n" }

[download]
gives me: 
90 - 90
192 - 192
257 - 196.129
9786 - 226.152.186
Note that 192 maps to a single 192 byte, not 195.128.

What's up?

—John

In reply to problem with chr function by John M. Dlugosz

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