Remote.prototype.pushUrl() Segmentation fault: 11 and Remote.prototype.setPushUrl(url) not working ?

So trying to change the push url after a clone:

```
var remote = repo.getRemote('origin');
remote.pushUrl(); <===== Seg Fault 
remote.setPushUrl(pushUrl); <===== git remote -v does not show the update
```

am I using this right ?

Thanks,
Did
