}
{
+ # What do the utf8::* functions do when given a reference? A test
+ # for a behavior change that made this start dying as of
+ # v5.15.6-407-gc710240 due to a fix for [perl #91852]:
+ #
+ # ./miniperl -Ilib -wle 'use strict; print $]; my $s = shift; my $s_ref = \$s; utf8::decode($s_ref); print $$s_ref' hlagh
+ my %expected = (
+ 'utf8::is_utf8' => { returns => "hlagh" },
+ 'utf8::valid' => { returns => "hlagh" },
+ 'utf8::encode' => { error => qr/Can't use string .*? as a SCALAR ref/},
+ 'utf8::decode' => { error => qr/Can't use string .*? as a SCALAR ref/},
+ 'utf8::upgrade' => { error => qr/Can't use string .*? as a SCALAR ref/ },
+ 'utf8::downgrade' => { returns => "hlagh" },
+ 'utf8::native_to_unicode' => { returns => "hlagh" },
+ 'utf8::unicode_to_native' => { returns => "hlagh" },
+ );
+ for my $func (sort keys %expected) { # sort just so it's deterministic wrt diffing *.t output
+ my $code = sprintf q[
+ use strict;
+ my $s = "hlagh";
+ my $r = \$s;
+ %s($r);
+ $$r;
+ ], $func;
+ my $ret = eval $code or my $error = $@;
+ if (my $error_rx = $expected{$func}->{error}) {
+ if (defined $error) {
+ like $error, $error_rx, "The $func function should die with an error matching $error_rx";
+ } else {
+ fail("We were expecting an error when calling the $func function but got a value of '$ret' instead");
+ }
+ } elsif (my $returns = $expected{$func}->{returns}) {
+ is($ret, $returns, "The $func function lives and returns '$returns' as expected");
+ } else {
+ die "PANIC: Internal Error"
+ }
+ }
+}
+
+{
my $a = "456\xb6";
utf8::upgrade($a);