Crash when accessing URLSessionDataTask

[Nonouf]

I'm currently testing purposely a failure on a request and when accessing the request on the URLSessionDataTask, it results in a unrecognized selector sent.

Step to reproduce:

• Do a request that will expect to fail
• Try to access task.currentRequest
• Your test suite will crash with -[Vinyl.URLSessionDataTask currentRequest]: unrecognized selector sent to instance 0x608000058f90

I haven't looked deeply in the problem, but my first thought was that it is really odd as Vinyl.URLSessionDataTask is a subclass of Foundation.URLSessionDataTask and so it shouldn't be a problem to access currentRequest. Any thought on that?

[jane-austin]

Hi @Nonouf do you have a failed canned response? Thank you.

[Nonouf]

HI @jane-austin.

Sorry, this is quite old now and I changed company since so I don't even have this code anymore. From my description, I think you'd be able to reproduce it quite easily. If you can't, feel free to close the issue.

[sreekanth-ch]

@dmcrodrigues @Kastet @
Same issue is still reproducible. Any response is greatly appreciated.

'2019-09-11 21:44:57.844374-0500 weatherForecastApp[35561:4074155] -[Vinyl.URLSessionDataTask originalRequest]: unrecognized selector sent to instance 0x60400024af20
2019-09-11 21:44:57.850231-0500 weatherForecastApp[35561:4074155] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Vinyl.URLSessionDataTask originalRequest]: unrecognized selector sent to instance 0x60400024af20'
*** First throw call stack:
(
0 CoreFoundation 0x0000000107bc01cb __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010444ef41 objc_exception_throw + 48
2 CoreFoundation 0x0000000107c40914 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x0000000107b43178 forwarding + 1432
4 CoreFoundation 0x0000000107b42b58 _CF_forwarding_prep_0 + 120
5 weatherForecastApp 0x0000000103adbab8 $s18weatherForecastApp14ViewControllerC16fetchTemperatureyyypSgF + 1720
6 weatherForecastApp 0x0000000103adc05b $s18weatherForecastApp14ViewControllerC16fetchTemperatureyyypSgFTo + 171
7 UIKit 0x0000000104e6dec9 -[UIApplication sendAction:to:from:forEvent:] + 83
8 UIKit 0x0000000104feb1f6 -[UIControl sendAction:to:forEvent:] + 67
9 UIKit 0x0000000104feb513 -[UIControl _sendActionsForEvents:withEvent:] + 450
10 UIKit 0x0000000104fea440 -[UIControl touchesEnded:withEvent:] + 618
11 UIKit 0x0000000104ee3b1b -[UIWindow _sendTouchesForEvent:] + 2807
12 UIKit 0x0000000104ee523e -[UIWindow sendEvent:] + 4124
13 UIKit 0x0000000104e88d96 -[UIApplication sendEvent:] + 352
14 UIKit 0x00000001057cafce __dispatchPreprocessedEventFromEventQueue + 2809
15 UIKit 0x00000001057cdc23 __handleEventQueueInternal + 5957
16 CoreFoundation 0x0000000107b632b1 CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17
17 CoreFoundation 0x0000000107c02d31 __CFRunLoopDoSource0 + 81
18 CoreFoundation 0x0000000107b47c19 __CFRunLoopDoSources0 + 185
19 CoreFoundation 0x0000000107b471ff __CFRunLoopRun + 1279
20 CoreFoundation 0x0000000107b46a89 CFRunLoopRunSpecific + 409
21 GraphicsServices 0x000000010c1e09c6 GSEventRunModal + 62
22 UIKit 0x0000000104e6c23c UIApplicationMain + 159
23 weatherForecastApp 0x0000000103aded3b main + 75
24 libdyld.dylib 0x00000001093a0d81 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException'

This happens when I call any method from its super class (URLSessionTask)
Example-
let task = turntable.dataTask(with: url!, completionHandler: displayTemperature)
task.resume()
task.originalRequest

Calling either currentRequest or originalRequest or any super class member results in a crash.