Xcode 8.1 Deployment target iOS 9.0

I'm getting an array of compact venue objects as expected from Foursquare Venue Search endpoint in...

```
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data

```

When I check the *data* object using...

```
if ([NSJSONSerialization isValidJSONObject:data])

```

i get a false.

Can someone tell me what is wrong over here?

Edit:
Here is the complete if block (after adding typecast to *data* in if block)...

```
    id foundationObject;

NSLog(@"data:- %@",data);
if ([NSJSONSerialization isValidJSONObject:(id)data])
{
    foundationObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    NSLog(@"venues foundation object:- %@",foundationObject);
}

```

Earlier the code didn't have the if block. just...

```
id foundationObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];

```

The change was made when I realized (using breakpoint just after the above statement) that *foundationObject* was nil even though *data* wasn't.

Note: this worked fine earlier when I shipped my app for iOS 9.x in march. Could the version of the Venue Endpoint being called be making a difference?