protected function handleImportLoop($name)
{
for ($env = $this->env; $env; $env = $env->parent) {
$file = $this->sourceNames[$env->block->sourceIndex];
if (realpath($file) === $name) {
$this->throwError('An @import loop has been found: %s imports %s', $file, basename($file));
break;
}
}
}