Example of failing request:
```
rpc.query({
model: 'link.tracker.click',
method: 'read_group',
args: [[links_domain, ['create_date', '>', interval]], ['country_id']],
kwargs: {groupby:'country_id'},
});
```
The RPC request built contains the following:
```
args: [[["link_id", "=", 1]], ["create_date"]]
kwargs: {groupby: "create_date:day", domain: [], fields: []}
```
This will be interpreted server side as:
```
model.read_group([['link_id', '=', 1]], ['create_date'], groupby=['create_date:day'], domain=[], fields=[])
```
2 arguments match `domain` and `fields`, which causes a crash.
opw-781300