UITableViewController crash on loading second time

I have a project where I want to open a UITableViewController after a UITableViewController via a UINavigationController. The thing is, it works the first time when it gets called by this function:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    SDMetadataEntity *entity = [self.optionItems objectAtIndex:indexPath.row];
    SudzcDetailViewController *detailViewController = [[SudzcDetailViewController alloc] init];
    detailViewController.refName = entity.Name;
    [self.navigationController pushViewController:detailViewController animated:YES];
    [detailViewController release];
    [entity release];
}

But when I press the back button on the navigation bar, and press the same item again, it crashes! It doesn't crash when I press a different item in the first UITableViewController. I would really like to learn from what I am doing wrong开发者_JAVA技巧!

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You should not

[entity release]; 

because when you do

[self.optionItems objectAtIndex:indexPath.row];

you just fetching a pointer to it, not init/copy/retaining it.

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You shouldn't be releasing entity.

You got that object from an array, you don't own it, so when you release it you may be causing it to be deallocated prematurely.