Unreal Engine Issues and Bug Tracker (UE-62672)

Description

Joining a session on iOS using the Join Session node in Blueprints causes a crash on iOS. This is similar to [Link Removed] but was requested to be entered separately.

This has not been reproduced in Main as I am being blocked by not being able to properly create a session.

Regression?: Yes
This does not occur in 4.19.2

Steps to Reproduce

Download the attached project
Package the project for iOS
Deploy the project onto two iOS devices that are both connected to the same Wi-fi network
Open the project on both iOS devices
On device 1, press Host and ensure that the print string mentions that a session was created
On device 2, press Join repeatedly until the client connects
Result: When it has connected, the client crashes
Expected: When it has connected, the client joins properly.

Callstack

 [2018.08.07-18.48.45:548][  8]LogIOS: Error: 0x03b50f00 UE4Game!FGenericPlatformStackWalk::StackWalkAndDump(char*, unsigned long, int, void*)   [UnknownFile]) 
0x03f002a0 UE4Game!SignalHandler(int, __siginfo*, void*)   [UnknownFile]) 
0x81214b58 libsystem_platform.dylib!_sigtramp()   [UnknownFile]) 
0x068bb968 UE4Game!UEngine::Browse(FWorldContext&, FURL, FString&)   [UnknownFile]) 
0x068bcc08 UE4Game!UEngine::TickWorldTravel(FWorldContext&, float)   [UnknownFile]) 
0x05f82168 UE4Game!UGameEngine::Tick(float, bool)   [UnknownFile]) 
0x0343a4f8 UE4Game!FEngineLoop::Tick()   [UnknownFile]) 
0x03f00b04 UE4Game!-[IOSAppDelegate MainAppThread:]   [UnknownFile]) 
0x8203defc Foundation!<redacted>()   [UnknownFile]) 
0x81219220 libsystem_pthread.dylib!<redacted>()   [UnknownFile]) 
0x81219110 libsystem_pthread.dylib!<redacted>()   [UnknownFile]) 
0x81217b10 libsystem_pthread.dylib!thread_start()   [UnknownFile])

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Fixed

Component	UE - Networking
Affects Versions	4.20
Target Fix	4.20.2

Fix Commit	4277216

Created	Aug 8, 2018
Resolved	Aug 10, 2018
Updated	Sep 16, 2019

View Jira Issue

UE-62672

Crash upon attempting to load into session via Join Session in Blueprints on iOS

Crash upon attempting to load into session via Join Session in Blueprints on iOS

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