+$pattern = "^(b+?|a){1,2}c";
+ok("bac" =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
+ok("bbac" =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
+ok("bbbac" =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
+ok("bbbbac" =~ /$pattern/ && $1 eq 'a', "[perl #3547]");
+
+{
+ # [perl #18232]
+ "\x{100}" =~ /(.)/;
+ ok( $1 eq "\x{100}", '$1 is utf-8 [perl #18232]' );
+ { 'a' =~ /./; }
+ ok( $1 eq "\x{100}", '$1 is still utf-8' );
+ ok( $1 ne "\xC4\x80", '$1 is not non-utf-8' );
+}
+
+{
+ use utf8;
+ my $attr = 'Name-1' ;
+
+ my $NormalChar = qr/[\p{IsDigit}\p{IsLower}\p{IsUpper}]/;
+ my $NormalWord = qr/${NormalChar}+?/;
+ my $PredNameHyphen = qr/^${NormalWord}(\-${NormalWord})*?$/;
+
+ $attr =~ /^$/;
+ ok( $attr =~ $PredNameHyphen, "[perl #19767] original test" );
+}
+
+{
+ use utf8;
+ "a" =~ m/[b]/;
+ ok ( "0" =~ /\p{N}+\z/, "[perl #19767] variant test" );
+}
+
+{
+
+ $p = 1;
+ foreach (1,2,3,4) {
+ $p++ if /(??{ $p })/
+ }
+ ok ($p == 5, "[perl #20683] (??{ }) returns stale values");
+ { package P; $a=1; sub TIESCALAR { bless[] } sub FETCH { $a++ } }
+ tie $p, P;
+ foreach (1,2,3,4) {
+ /(??{ $p })/
+ }
+ ok ( $p == 5, "(??{ }) returns stale values");
+}
+
+{
+ # Subject: Odd regexp behavior
+ # From: Markus Kuhn <Markus.Kuhn@cl.cam.ac.uk>
+ # Date: Wed, 26 Feb 2003 16:53:12 +0000
+ # Message-Id: <E18o4nw-0008Ly-00@wisbech.cl.cam.ac.uk>
+ # To: perl-unicode@perl.org
+
+ $x = "\x{2019}\nk"; $x =~ s/(\S)\n(\S)/$1 $2/sg;
+ ok($x eq "\x{2019} k", "Markus Kuhn 2003-02-26");
+
+ $x = "b\nk"; $x =~ s/(\S)\n(\S)/$1 $2/sg;
+ ok($x eq "b k", "Markus Kuhn 2003-02-26");
+
+ ok("\x{2019}" =~ /\S/, "Markus Kuhn 2003-02-26");
+}
+
+{
+ my $i;
+ ok('-1-3-5-' eq join('', split /((??{$i++}))/, '-1-3-5-'),
+ "[perl #21411] (??{ .. }) corrupts split's stack");
+ split /(?{'WOW'})/, 'abc';
+ ok('a|b|c' eq join ('|', @_),
+ "[perl #21411] (?{ .. }) version of the above");
+}
+
+{
+ split /(?{ split "" })/, "abc";
+ ok(1,'cache_re & "(?{": it dumps core in 5.6.1 & 5.8.0');
+}
+
+{
+ ok("\x{100}\n" =~ /\x{100}\n$/, "UTF8 length cache and fbm_compile");
+}
+
+{
+ package Str;
+ use overload q/""/ => sub { ${$_[0]}; };
+ sub new { my ($c, $v) = @_; bless \$v, $c; }
+
+ package main;
+ $_ = Str->new("a\x{100}/\x{100}b");
+ ok(join(":", /\b(.)\x{100}/g) eq "a:/", "re_intuit_start and PL_bostr");
+}
+
+{
+ $_ = "code: 'x' { '...' }\n"; study;
+ my @x; push @x, $& while m/'[^\']*'/gx;
+ ok(join(":", @x) eq "'x':'...'",
+ "[perl #17757] Parse::RecDescent triggers infinite loop");
+}
+
+{
+ my $re = qq/^([^X]*)X/;
+ utf8::upgrade($re);
+ ok("\x{100}X" =~ /$re/, "S_cl_and ANYOF_UNICODE & ANYOF_INVERTED");
+}
+
+# bug #22354
+sub func ($) {
+ ok( "a\nb" !~ /^b/, $_[0] );
+ ok( "a\nb" =~ /^b/m, "$_[0] - with /m" );
+}
+func "standalone";
+$_ = "x"; s/x/func "in subst"/e;
+$_ = "x"; s/x/func "in multiline subst"/em;
+#$_ = "x"; /x(?{func "in regexp"})/;
+#$_ = "x"; /x(?{func "in multiline regexp"})/m;
+
+# bug #19049
+$_="abcdef\n";
+@x = m/./g;
+ok("abcde" eq "$`", '# TODO #19049 - global match not setting $`');
+
+ok("123\x{100}" =~ /^.*1.*23\x{100}$/, 'uft8 + multiple floating substr');
+
+# LATIN SMALL/CAPITAL LETTER A WITH MACRON
+ok(" \x{101}" =~ qr/\x{100}/i,
+ "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+
+# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW
+ok(" \x{1E01}" =~ qr/\x{1E00}/i,
+ "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+
+# DESERET SMALL/CAPITAL LETTER LONG I
+ok(" \x{10428}" =~ qr/\x{10400}/i,
+ "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+
+# LATIN SMALL/CAPITAL LETTER A WITH RING BELOW + 'X'
+ok(" \x{1E01}x" =~ qr/\x{1E00}X/i,
+ "<20030808193656.5109.1@llama.ni-s.u-net.com>");
+
+{
+ # [perl #23769] Unicode regex broken on simple example
+ # regrepeat() didn't handle UTF-8 EXACT case right.
+
+ my $s = "\x{a0}\x{a0}\x{a0}\x{100}"; chop $s;
+
+ ok($s =~ /\x{a0}/, "[perl #23769]");
+ ok($s =~ /\x{a0}+/, "[perl #23769]");
+ ok($s =~ /\x{a0}\x{a0}/, "[perl #23769]");
+}
+
+# last test 1015
+