Snarky iOS SDK error message

gistfile1.txt

2013-02-28 09:08:03.731 IICaptain[1328:907] *** -[__NSCFCalendar components:fromDate:]: date cannot be nil
I mean really, what do you think that operation is supposed to mean with a nil date?
An exception has been avoided for now.
A few of these errors are going to be reported with this complaint, then further violations will simply silently do whatever random thing results from the nil.
Here is the backtrace where this occurred this time (some frames may be missing due to compiler optimizations):
(
  0   CoreFoundation                      0x33052a25 <redacted> + 84
	1   IICaptain                           0x000c751f +[DateUtil setLastDayOfTheWeek:] + 110
	2   IICaptain                           0x000c6269 -[CylinderChartData setData:] + 2136
	3   IICaptain                           0x000c033b __38-[ChartViewController viewWillAppear:]_block_invoke + 166
	4   IICaptain                           0x0009bec3 __91-[IICaptainAPI getHistoricalDataForDeploymentId:startDate:endDate:successBlock:errorBlock:]_block_invoke + 754
	5   IICaptain                           0x0008a01f __64-[AFHTTPRequestOperation setCompletionBlockWithSuccess:failure:]_block_invoke142 + 98
	6   libdispatch.dylib                   0x3b1f911f <redacted> + 10
	7   libdispatch.dylib                   0x3b1f84b7 <redacted> + 22
	8   libdispatch.dylib                   0x3b1fd1bd <redacted> + 224
	9   CoreFoundation                      0x33097f3b <redacted> + 1290
	10  CoreFoundation                      0x3300aebd CFRunLoopRunSpecific + 356
	11  CoreFoundation                      0x3300ad49 CFRunLoopRunInMode + 104
	12  GraphicsServices                    0x36be12eb GSEventRunModal + 74
	13  UIKit                               0x34f20301 UIApplicationMain + 1120
	14  IICaptain                           0x0007c8f9 main + 116
	15  IICaptain                           0x0007c880 start + 40
)