Crashed: NSOperationQueue 0x1c002f980 (QOS: UNSPECIFIED)

[chanonly123]

#1. Crashed: NSOperationQueue 0x1c002f980 (QOS: UNSPECIFIED) 0 libswiftCore.dylib 0x1064bab50 hidden#25718 (_hidden#25744:608) 1 Just 0x105a5982c specialized HTTP.urlSession(URLSession, task : URLSessionTask, didCompleteWithError : Error?) -> () (Just.swift:1127) 2 Just 0x105a5982c specialized HTTP.urlSession(URLSession, task : URLSessionTask, didCompleteWithError : Error?) -> () (Just.swift:1127) 3 Just 0x105a40158 @objc HTTP.urlSession(URLSession, task : URLSessionTask, didCompleteWithError : Error?) -> () (Just.swift) 4 CFNetwork 0x184d269d4 __51-[NSURLSession delegate_task:didCompleteWithError:]_block_invoke.207 + 76 5 Foundation 0x184fc1ba0 NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK + 16 6 Foundation 0x184f01894 -[NSBlockOperation main] + 72 7 Foundation 0x184ef14c4 -[__NSOperationInternal _start:] + 848 8 libdispatch.dylib 0x183f6aa14 _dispatch_client_callout + 16 9 libdispatch.dylib 0x183f72200 _dispatch_block_invoke_direct$VARIANT$mp + 288 10 libdispatch.dylib 0x183f6aa14 _dispatch_client_callout + 16 11 libdispatch.dylib 0x183f72200 _dispatch_block_invoke_direct$VARIANT$mp + 288 12 libdispatch.dylib 0x183f720ac dispatch_block_perform$VARIANT$mp + 104 13 Foundation 0x184fc3878 __NSOQSchedule_f + 376 14 libdispatch.dylib 0x183f6aa14 _dispatch_client_callout + 16 15 libdispatch.dylib 0x183f72f08 _dispatch_continuation_pop$VARIANT$mp + 428 16 libdispatch.dylib 0x183f7180c _dispatch_async_redirect_invoke$VARIANT$mp + 604 17 libdispatch.dylib 0x183f77cf4 _dispatch_root_queue_drain + 600 18 libdispatch.dylib 0x183f77a38 _dispatch_worker_thread3 + 120 19 libsystem_pthread.dylib 0x18421306c _pthread_wqthread + 1268 20 libsystem_pthread.dylib 0x184212b6c start_wqthread + 4

[shanmukhsista]

@chanonly123 : Did you get a fix for this error. I'm experiencing the exact same issue ? Are you facing this error every time a task fails or is it intermittent ?

[Husseinhj]

Same problem

[svoip]

Same here. In addition, the crash seems to happen inside URLSession's 'didCompleteWithError', in the row taskConfigs.removeValue(forKey: task.taskIdentifier)

Crashed: NSOperationQueue 0x2827e6f20 (QOS: UNSPECIFIED) 0 Just 0x1015f3554 $sSD8_VariantV11removeValue6forKeyq_Sgx_tFSi_4Just17TaskConfigurationVTg5 + 44 1 Just 0x1015fd564 $s4Just4HTTPC10urlSession_4task20didCompleteWithErrorySo12NSURLSessionC_So0J4TaskCs0I0_pSgtFTf4dnnn_n + 1212 2 Just 0x1015f0a4c $s4Just4HTTPC10urlSession_4task20didCompleteWithErrorySo12NSURLSessionC_So0J4TaskCs0I0_pSgtFTo + 76 3 CFNetwork 0x2225eb420 __51-[NSURLSession delegate_task:didCompleteWithError:]_block_invoke.182 + 252 4 Foundation 0x2228ccef8 NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK + 16 ...

This blog post https://topologyeyewear.github.io/engineering-blog/2018/03/07/heap_corruption/ made me thinking: Isn't "taskConfigs" object running into heap corruption?