MacOS 10.14.6 Mojave.
Node v10.15.3
LocalStack - docker image 0.10.4

When invoking a Lambda from Node.js code.


    const lambda = new Aws.Lambda(creds);
    
    const payload = {};
    
    const clientContext = {
        invokedFunctionArn: this._workerArn
    };
    
    const params = {
        FunctionName: this._workerArn,
        InvocationType: "RequestResponse", // "DryRun",
        LogType: 'Tail', // "None", "Tail"
        ClientContext: JSON.stringify(clientContext),
        Payload: JSON.stringify(payload)
    };
    
    console.log(`DEBUG: Executing lambda ${JSON.stringify(params)}`);
    
    lambda.invoke(params, function (err, data) {
        console.log(`DEBUG: Printing lambda return arguments`);
        console.log(JSON.stringify(arguments));
        console.log(data.LogResult);
    });```
DEBUG: Printing lambda return arguments
{"0":null,"1":{"StatusCode":200,"Payload":"null"}}
undefined
```

Expecting to see the Lambda execution log in `data.LogResult`, but no such object returned,
yet Localstack Cloudwatch logs recorded the execution logs correctly.


```
EVENTS	75	1570381308926.664	+51733/05/27/[$LATEST]629146bb	START RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3 Version: $LATEST	1570381306039
EVENTS	76	1570381308926.664	+51733/05/27/[$LATEST]629146bb	2019-10-06T17:01:47.924Z	dbd86068-78c8-1a62-29ca-9c0a4a8580c3	INFO	DEBUG: LOCALSTACK_HOSTNAME=172.17.0.1	1570381306520
...
EVENTS	79	1570381308926.664	+51733/05/27/[$LATEST]629146bb	END RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	1570381307961
EVENTS	80	1570381308926.664	+51733/05/27/[$LATEST]629146bb	REPORT RequestId: dbd86068-78c8-1a62-29ca-9c0a4a8580c3	Duration: 16.05 ms	Billed Duration: 100 ms	Memory Size: 1536 MB	Max Memory Used: 57 MB		1570381308442
```

What I'm missing? Why it doesn't return logs on invoke?

Thanks



┆Issue is synchronized with this [Jira Bug](https://localstack.atlassian.net/browse/LOC-125) by [Unito](https://www.unito.io/learn-more)

}
        if isinstance(result, Response):
            details['Payload'] = to_str(result.data)
            if result.status_code >= 400:
                details['FunctionError'] = 'Unhandled'
        elif isinstance(result, dict):
            for key in ('StatusCode', 'Payload', 'FunctionError'):
                if result.get(key):
                    details[key] = result[key]
        
        was_json = False
        payload = details['Payload']
        if payload and isinstance(payload, POSSIBLE_JSON_TYPES) and payload[0] in JSON_START_CHARS:
            try:
                details['Payload'] = json.loads(details['Payload'])
                was_json = True
            except Exception:
                pass
        
        if details.get('FunctionError'):
            details['Headers']['X-Amz-Function-Error'] = str(details['FunctionError'])
        
        logs = log_output[-4000:] if log_type == 'Tail' else ''
        details['Headers']['X-Amz-Log-Result'] = base64.b64encode(to_bytes(logs))
        details['Headers']['X-Amz-Executed-Version'] = str(qualifier or VERSION_LATEST)
        
        response_obj = details['Payload']
        if was_json or isinstance(response_obj, JSON_START_TYPES):
            response_obj = json_safe(response_obj)
            response_obj = jsonify(response_obj)