Malformed UTF-8 character (unexpected non-continuation byte 0x73, immediately after start byte 0xf8) at - line 14.
########
use warnings 'utf8';
-my $surr = chr(0xD800);
-my $fff3 = chr(0xFFFE);
-my $ffff = chr(0xFFFF);
+my $d7ff = chr(0xD7FF);
+my $d800 = chr(0xD800);
+my $dfff = chr(0xDFFF);
+my $e000 = chr(0xE000);
+my $feff = chr(0xFEFF);
+my $fffd = chr(0xFFFD);
+my $fffe = chr(0xFFFE);
+my $ffff = chr(0xFFFF);
+my $hex4 = chr(0x10000);
+my $hex5 = chr(0x100000);
+my $maxm1 = chr(0x10FFFE);
+my $max = chr(0x10FFFF);
no warnings 'utf8';
-$surr = chr(0xD800);
-$fffe = chr(0xFFFE);
-$ffff = chr(0xFFFF);
+my $d7ff = chr(0xD7FF);
+my $d800 = chr(0xD800);
+my $dfff = chr(0xDFFF);
+my $e000 = chr(0xE000);
+my $feff = chr(0xFEFF);
+my $fffd = chr(0xFFFD);
+my $fffe = chr(0xFFFE);
+my $ffff = chr(0xFFFF);
+my $hex4 = chr(0x10000);
+my $hex5 = chr(0x100000);
+my $maxm1 = chr(0x10FFFE);
+my $max = chr(0x10FFFF);
EXPECT
-UTF-16 surrogate 0xd800 at - line 2.
-Unicode character 0xfffe is illegal at - line 3.
-Unicode character 0xffff is illegal at - line 4.
+UTF-16 surrogate 0xd800 at - line 3.
+UTF-16 surrogate 0xdfff at - line 4.
+Unicode character 0xfffe is illegal at - line 8.
+Unicode character 0xffff is illegal at - line 9.
+Unicode character 0x10fffe is illegal at - line 12.
+Unicode character 0x10ffff is illegal at - line 13.
########
+use warnings 'utf8';
+my $d7ff = pack("U", 0xD7FF);
+my $d800 = pack("U", 0xD800);
+my $dfff = pack("U", 0xDFFF);
+my $e000 = pack("U", 0xE000);
+my $feff = pack("U", 0xFEFF);
+my $fffd = pack("U", 0xFFFD);
+my $fffe = pack("U", 0xFFFE);
+my $ffff = pack("U", 0xFFFF);
+my $hex4 = pack("U", 0x10000);
+my $hex5 = pack("U", 0x100000);
+my $maxm1 = pack("U", 0x10FFFE);
+my $max = pack("U", 0x10FFFF);
+no warnings 'utf8';
+my $d7ff = pack("U", 0xD7FF);
+my $d800 = pack("U", 0xD800);
+my $dfff = pack("U", 0xDFFF);
+my $e000 = pack("U", 0xE000);
+my $feff = pack("U", 0xFEFF);
+my $fffd = pack("U", 0xFFFD);
+my $fffe = pack("U", 0xFFFE);
+my $ffff = pack("U", 0xFFFF);
+my $hex4 = pack("U", 0x10000);
+my $hex5 = pack("U", 0x100000);
+my $maxm1 = pack("U", 0x10FFFE);
+my $max = pack("U", 0x10FFFF);
+EXPECT
+UTF-16 surrogate 0xd800 at - line 3.
+UTF-16 surrogate 0xdfff at - line 4.
+Unicode character 0xfffe is illegal at - line 8.
+Unicode character 0xffff is illegal at - line 9.
+Unicode character 0x10fffe is illegal at - line 12.
+Unicode character 0x10ffff is illegal at - line 13.
+########
+use warnings 'utf8';
+my $d7ff = "\x{D7FF}";
+my $d800 = "\x{D800}";
+my $dfff = "\x{DFFF}";
+my $e000 = "\x{E000}";
+my $feff = "\x{FEFF}";
+my $fffd = "\x{FFFD}";
+my $fffe = "\x{FFFE}";
+my $ffff = "\x{FFFF}";
+my $hex4 = "\x{10000}";
+my $hex5 = "\x{100000}";
+my $maxm1 = "\x{10FFFE}";
+my $max = "\x{10FFFF}";
+no warnings 'utf8';
+my $d7ff = "\x{D7FF}";
+my $d800 = "\x{D800}";
+my $dfff = "\x{DFFF}";
+my $e000 = "\x{E000}";
+my $feff = "\x{FEFF}";
+my $fffd = "\x{FFFD}";
+my $fffe = "\x{FFFE}";
+my $ffff = "\x{FFFF}";
+my $hex4 = "\x{10000}";
+my $hex5 = "\x{100000}";
+my $maxm1 = "\x{10FFFE}";
+my $max = "\x{10FFFF}";
+EXPECT
+UTF-16 surrogate 0xd800 at - line 3.
+UTF-16 surrogate 0xdfff at - line 4.
+Unicode character 0xfffe is illegal at - line 8.
+Unicode character 0xffff is illegal at - line 9.
+Unicode character 0x10fffe is illegal at - line 12.
+Unicode character 0x10ffff is illegal at - line 13.