BillItem:                                        
      local: id
      foreign: bill_id
      type: many
      cascade: [delete]   # <-- BUILDER does not write in {object}Base.php this line

It is not copy of ticket #1234.

Builder does not write in {object}Base.php this line {... 'cascade' => array('delete') ... }

Error in following method Doctrine_Import_Builder::buildSetUp(). There ara nothing about cascade.

                if (isset($relation['refClass'])) {
                    $a[] = ''refClass' => ' . $this->varExport($relation['refClass']);
                }

                if (isset($relation['deferred']) && $relation['deferred']) {
                    $a[] = ''default' => ' . $this->varExport($relation['deferred']);
                }

                if (isset($relation['local']) && $relation['local']) {
                    $a[] = ''local' => ' . $this->varExport($relation['local']);
                }

                if (isset($relation['foreign']) && $relation['foreign']) {
                    $a[] = ''foreign' => ' . $this->varExport($relation['foreign']);
                }

                if (isset($relation['onDelete']) && $relation['onDelete']) {
                    $a[] = ''onDelete' => ' . $this->varExport($relation['onDelete']);
                }

                if (isset($relation['onUpdate']) && $relation['onUpdate']) {
                    $a[] = ''onUpdate' => ' . $this->varExport($relation['onUpdate']);
                }

                if (isset($relation['equal']) && $relation['equal']) {
                    $a[] = ''equal' => ' . $this->varExport($relation['equal']);
                }

                if (isset($relation['owningSide']) && $relation['owningSide']) {
                    $a[] = ''owningSide' => ' . $this->varExport($relation['owningSide']);
                }

                if ( ! empty($a)) {
                    $ret[$i] .= ', ' . 'array(';
                    $length = strlen($ret[$i]);
                    $ret[$i] .= implode(',' . PHP_EOL . str_repeat(' ', $length), $a) . ')';
                }

NEED append after owningSide:

                if (isset($relation['cascade']) && $relation['cascade']) {
                    $a[] = ''cascade' => ' . $this->varExport($relation['cascade']);
                }