$_ = "\x80 \xff" ;
chop ;
EXPECT
-\x80 will produce malformed UTF-8 character; use \x{80} for that at - line 4.
-\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 4.
-Malformed UTF-8 character at - line 5.
+\x80 will produce malformed UTF-8 character; use \x{80} for that at - line 10.
+\xff will produce malformed UTF-8 character; use \x{ff} for that at - line 10.
+Malformed UTF-8 character at - line 11.