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#!./perl -w
require './test.pl';
use strict;
#
# This test checks for $@ being set early during an exceptional
# unwinding, and that this early setting does not affect the late
# setting used to emit the exception from eval{}. The early setting is
# a backward-compatibility hack to satisfy modules that were relying on
# the historical early setting in order to detect exceptional unwinding.
# This hack should be removed when a proper way to detect exceptional
# unwinding has been developed.
#
{
package End;
sub DESTROY { $_[0]->() }
sub main::end(&) {
my($cleanup) = @_;
return bless(sub { $cleanup->() }, "End");
}
}
my($uerr, $val, $err);
$@ = "";
$val = eval {
my $c = end { $uerr = $@; $@ = "t2\n"; };
1;
}; $err = $@;
is($uerr, "", "\$@ false at start of 'end' block inside 'eval' block");
is($val, 1, "successful return from 'eval' block");
is($err, "", "\$@ still false after 'end' block inside 'eval' block");
$@ = "t0\n";
$val = eval {
$@ = "t1\n";
my $c = end { $uerr = $@; $@ = "t2\n"; };
1;
}; $err = $@;
is($uerr, "t1\n", "true value assigned to \$@ before 'end' block inside 'eval' block");
is($val, 1, "successful return from 'eval' block");
is($err, "", "\$@ still false after 'end' block inside 'eval' block");
$@ = "";
$val = eval {
my $c = end { $uerr = $@; $@ = "t2\n"; };
do {
die "t3\n";
};
1;
}; $err = $@;
is($uerr, "t3\n");
is($val, undef, "undefined return value from 'eval' block with 'die'");
is($err, "t3\n");
$@ = "t0\n";
$val = eval {
$@ = "t1\n";
my $c = end { $uerr = $@; $@ = "t2\n"; };
do {
die "t3\n";
};
1;
}; $err = $@;
is($uerr, "t3\n");
is($val, undef, "undefined return value from 'eval' block with 'die'");
is($err, "t3\n");
done_testing();
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