Deleting task does not call completion handler

[MobileKaz]

Hi, 

I'm using this code to delete a task, which has been working for months until several days ago:

GTLQueryTasks *query = [GTLQueryTasks queryForTasksDeleteWithTasklist:task.listIdentifier task:task.identifier];

self.editTaskTicket = [tasksService executeQuery:query completionHandler:^(GTLServiceTicket *ticket, id item, NSError *error) {

    // callback

    ...

}];   

When I call this, the task is deleted successfully, but the completion handler is never called. 

Has anybody seen this problem before? 

[MobileKaz]

Further test shows that there's an assertion error:

*** Assertion failure in +[GTLObject objectForJSON:defaultClass:surrogates:batchClassMap:](), /Users/aesthology/iPhone/Live/Organizer/Classes/GTasks/Objects/GTLObject.m:538

which points to this line:

GTL_ASSERT([json count] != 0, @"Creating object from empty json");

[Greg Robbins]

The API servers changed to return empty result objects, and and the change is triggered an assert in debug builds of the library. This was fixed in the library a few weeks ago; try updating your sources with subversion.

https://code.google.com/p/google-api-objectivec-client/source/detail?r=207