+
+{ my $s = join("", chr(0x1234), chr(0xff));
+ print "not " unless length($s) == 2 && $s eq "\x{1234}\x{ff}";
+ print "ok 11\n";
+}
+
+{ my $s = join(chr(0xff), chr(0x1234), "");
+ print "not " unless length($s) == 2 && $s eq "\x{1234}\x{ff}";
+ print "ok 12\n";
+}
+
+{ my $s = join(chr(0x1234), chr(0xff), chr(0x2345));
+ print "not " unless length($s) == 3 && $s eq "\x{ff}\x{1234}\x{2345}";
+ print "ok 13\n";
+}
+
+{ my $s = join(chr(0xff), chr(0x1234), chr(0xfe));
+ print "not " unless length($s) == 3 && $s eq "\x{1234}\x{ff}\x{fe}";
+ print "ok 14\n";
+}
+