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$rc = func();
if ($rc != 0) {
  die "Failed to func!";
}

eval {
  func();
...
if ($@) {
  die "Failed to func: $@";
}

use Error::Handler;
$rc = func();
if (not $rc->ok()) {
  die $rc->error_msg();
}

$rc = func();
if ($rc != 0) {
  die "Failed to func!";
}