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                    reserved parenthesis taint closure semicolon);
    no warnings qw(exec newline);
=cut
 
sub DIAG () { 0 }
 
my $unopened = 10;
open my $closed, '>', \(my $o = "");close $closed;
open my $raw, '>:raw', \(my $x = "");
 
sub test_warn_die(&;@) {
        my $code = shift;
        my $name = shift;
        my $warn = 0;
        my $die = 0;
        local $SIG{__WARN__} = sub {
                $warn = 1;
                DIAG and diag "$name should not: @_"
        };
        local $SIG{__DIE__}  = sub { $die = 1; };
        my $rc = eval {
                $code->();
        1};
        my $e = $@;
        ok !$warn, "$name - no warn";
        ok $die,   "$name - died";
        ok !$rc,   "$name - eval failed";
        ok $e,     "$name - have error" and DIAG and diag $e;
         
}
 
sub test_no_warn(&;@) {
        my $code = shift;
        my $name = shift;
        my $warn = 0;
        local $SIG{__WARN__} = sub {
                $warn = 1;
                diag "$name: @_";
        };
        $code->();
        ok !$warn, "$name - no warn";
}