Unreal Engine Issues and Bug Tracker (UE-44811)

Description

QAGame crashes when it launched onto Firefox. The following exception occurs with the error message:

*Expression (0) failed in D:\UE4_Dev-Rendering\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:422! Check console for details.

error: uncaught exception: ASM_CONSTS<@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:38655
_emscripten_asm_const_iiii@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:42690
__Z15html5_break_msgPKcS0_i@http://localhost:53501/QAGame.html:46162754:1
__ZN15FTaskThreadBase21ProcessTasksUntilIdleEi@http://localhost:53501/QAGame.html:43333935:1
__ZN15FTaskThreadBase4TickEv@http://localhost:53501/QAGame.html:46385227:1
__ZThn4_N15FTaskThreadBase4TickEv@http://localhost:53501/QAGame.html:46581977:1
__ZN11FFakeThread4TickEv@http://localhost:53501/QAGame.html:45217133:1
__ZN14FThreadManager4TickEv@http://localhost:53501/QAGame.html:19854744:1
__ZN11FEngineLoop4TickEv@http://localhost:53501/QAGame.html:2483482:1
__Z10HTML5_Tickv@http://localhost:53501/QAGame.html:43360607:1
dynCall_v@http://localhost:53501/QAGame.html:46686727:1
Module.dynCall_v@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:816146
_emscripten_set_main_loop/browserIterationFunc@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:113332
Browser.mainLoop.runIter@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:116443
Browser_mainLoop_runner@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:114869
  QAGame.html:600:2
uncaught exception: ASM_CONSTS<@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:38655
_emscripten_asm_const_iiii@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:42690
__Z15html5_break_msgPKcS0_i@http://localhost:53501/QAGame.html:46162754:1
__ZN15FTaskThreadBase21ProcessTasksUntilIdleEi@http://localhost:53501/QAGame.html:43333935:1
__ZN15FTaskThreadBase4TickEv@http://localhost:53501/QAGame.html:46385227:1
__ZThn4_N15FTaskThreadBase4TickEv@http://localhost:53501/QAGame.html:46581977:1
__ZN11FFakeThread4TickEv@http://localhost:53501/QAGame.html:45217133:1
__ZN14FThreadManager4TickEv@http://localhost:53501/QAGame.html:19854744:1
__ZN11FEngineLoop4TickEv@http://localhost:53501/QAGame.html:2483482:1
__Z10HTML5_Tickv@http://localhost:53501/QAGame.html:43360607:1
dynCall_v@http://localhost:53501/QAGame.html:46686727:1
Module.dynCall_v@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:816146
_emscripten_set_main_loop/browserIterationFunc@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:113332
Browser.mainLoop.runIter@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:116443
Browser_mainLoop_runner@blob:http://localhost:53501/ca94b2c5-d69a-46ea-87d9-d7396e88a823:1:114869
  (unknown)

Steps to Reproduce

Open QAGame in editor.
Open the level QA-Promotion.
Click the dropdown next to Launch and select Firefox (64-bit).

RESULT

Game crashes when launching onto Firefox

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Fixed

Component	UE - Platform - Mobile
Affects Versions	4.17
Target Fix	4.17

Fix Commit	3465499
Main Commit	3496903

Created	May 8, 2017
Resolved	May 30, 2017
Updated	Dec 13, 2017

UE-44811

Projects crash when launching onto Firefox 64-bit

Projects crash when launching onto Firefox 64-bit

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