Open Radar

 
Summary:
On iOS8 (beta 5), NSURLSession returns errors that have no "NSLocalizedDescription". This is not the case with NSURLConnection, and it is new to iOS7.

Steps to Reproduce:
See attached minimal sample project. Here's the relevant code section:

```

    // Create a failing request
    NSURLRequest * request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://nonexistingdomain.tld"]];
    
    // Load it with NSURLConnection
    [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue]
                           completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
     {
         printf("NSURLConnection: %s(%d) %s\n", error.domain.UTF8String, (int)error.code, error.localizedDescription.UTF8String);
         // On iOS7.1: NSURLConnection: NSURLErrorDomain(-1009) The Internet connection appears to be offline.
         // On iOS8b5: NSURLConnection: NSURLErrorDomain(-1009) The Internet connection appears to be offline.
     }];
    
    // Load it with NSURLSession
    [[[NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]]
      dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error)
      {
          printf("NSURLSession: %s(%d) %s\n", error.domain.UTF8String, (int)error.code, error.localizedDescription.UTF8String);
          // On iOS7.1: NSURLSession: NSURLErrorDomain(-1009) The Internet connection appears to be offline.
          // On iOS8b5: NSURLSession: NSURLErrorDomain(-1009) The operation couldn’t be completed. (NSURLErrorDomain error -1009.)
      }] resume];


```

Expected Results:
The returned NSError should have a localized description, and be user-displayable.

Actual Results:
The returned NSError has no userInfo at all, just a domain and a code.

This is only happening when using NSURLSession on iOS8. On iOS7, NSURLSession is returning a displayable NSError, and NSURLConnection is working fine both on iOS7 and iOS8.

Version:
iOS8b5

Notes:


Configuration:
Xcode6b6, iPhone Simulator

Attachments:
'NetworkErrorDescriptionTest.zip' was successfully uploaded.


http://cl.ly/2i2y2r38010G/download/NetworkErrorDescriptionTest.zip