use Char::UHC;
print "1..1\n";

my $__FILE__ = __FILE__;

# (?:\{)
if ("{" =~ m/(?:\{)/) {
    print qq<ok - 1 "{" =~ m/(?:\\{)/ $^X $__FILE__\n>;
}
else{
    print qq<not ok - 1 "{" =~ m/(?:\\{)/ $^X $__FILE__\n>;
}

__END__