Description

Opening a specific particle system crashes the editor. If the particle system is used within a level and the level is played, the editor will crash with no callstack. Logs are attached.

Frequency: 5/5

Crashreporter: N/A

Steps to Reproduce

1. Download, unzip attached .uasset file
2. Add asset to any project
3. Open project with asset in 4.11
4. Navigate to asset location, double click to open

Results:

Editor attempts to open particle system editor window, crashes immediately after

Expected:

Particle system editor remains open.

Callstack

MachineId:4E82586D46B558EA69EF0EAA821297B1
EpicAccountId:1558531203f84e81b70959b8a59badef

Assertion failed: TRAIL_EMITTER_IS_START(StartTrailData->Flags) [Link Removed] [Line: 1613]

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\core\private\misc\outputdevice.cpp:430]
UE4Editor_Engine!FParticleRibbonEmitterInstance::Spawn_Source() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particletrail2emitterinstance.cpp:1618]
UE4Editor_Engine!FParticleRibbonEmitterInstance::Spawn() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particletrail2emitterinstance.cpp:1194]
UE4Editor_Engine!FParticleEmitterInstance::Tick_SpawnParticles() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particleemitterinstances.cpp:930]
UE4Editor_Engine!FParticleTrailsEmitterInstance_Base::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particletrail2emitterinstance.cpp:102]
UE4Editor_Engine!UParticleSystemComponent::ComputeTickComponent_Concurrent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particlecomponents.cpp:4201]
UE4Editor_Engine!UParticleSystemComponent::TickComponent() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\engine\private\particles\particlecomponents.cpp:4131]
UE4Editor_Cascade!FCascade::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\cascade\private\cascade.cpp:1541]
UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\public\tickableeditorobject.h:15]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\editorengine.cpp:1123]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\editor\unrealed\private\unrealedengine.cpp:368]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\launchengineloop.cpp:2637]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++ue4+release-4.11\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

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Cannot Reproduce
ComponentUE - Rendering
Affects Versions4.11
Target Fix4.11
Fix Commit2823992
CreatedJan 27, 2016
ResolvedJan 29, 2016
UpdatedMay 2, 2018