Crash when using "Convert to Seeded" on a Particle System Cascade module
This is a Regression as it does not occur in 4.10
Error message:
Assertion failed: *Offset < (uint32)InstancePayloadSize [Link Removed] [Line: 1425]
Source Context:
1411
1412 uint32* Offset = SpriteTemplate->ModuleOffsetMap.Find(Module);
1413 return (Offset != nullptr) ? *Offset : 0;
1414 }
1415
1416 uint8* FParticleEmitterInstance::GetModuleInstanceData(UParticleModule* Module)
1417 {
1418 // If there is instance data present, look up the modules offset
1419 if (InstanceData)
1420 {
1421 uint32* Offset = SpriteTemplate->ModuleInstanceOffsetMap.Find(Module);
1422 if (Offset)
1423 {
1424 check(*Offset < (uint32)InstancePayloadSize);
1425 ***** return &(InstanceData[*Offset]);
1426 }
1427 }
1428 return NULL;
1429 }
1430
1431 /**
1432 *Get the pointer to the instance data allocated for type data module.
1433 *
1434 *@returnuint8*The pointer to the data
1435 */
1436 uint8* FParticleEmitterInstance::GetTypeDataModuleInstanceData()
1437 {
1438 if (InstanceData && (TypeDataInstanceOffset != -1))
1439 {
1440 return &(InstanceData[TypeDataInstanceOffset]);
Most recent user affected CL: 2946394
Logs:
[Link Removed]
1. Create a Particle System
2. Open it in Cascade
3. Right click on the Initial Velocity module
4. Select "Convert to Seeded"
Result: Crash
Expected: Module is converted to Seeded
UE4Editor_Engine!FParticleEmitterInstance::GetModuleInstanceData() particleemitterinstances.cpp:1426 UE4Editor_Engine!UParticleModuleSize_Seeded::Spawn() particlemodules_size.cpp:110 UE4Editor_Engine!FParticleEmitterInstance::SpawnParticles() particleemitterinstances.cpp:2003 UE4Editor_Engine!FParticleEmitterInstance::Spawn() particleemitterinstances.cpp:1958 UE4Editor_Engine!FParticleEmitterInstance::Tick_SpawnParticles() particleemitterinstances.cpp:930 UE4Editor_Engine!FParticleEmitterInstance::Tick() particleemitterinstances.cpp:722 UE4Editor_Engine!UParticleSystemComponent::ComputeTickComponent_Concurrent() particlecomponents.cpp:4201 UE4Editor_Engine!UParticleSystemComponent::TickComponent() particlecomponents.cpp:4131 UE4Editor_Cascade!FCascade::Tick() cascade.cpp:1541 UE4Editor_UnrealEd!FTickableEditorObject::TickObjects() tickableeditorobject.h:15 UE4Editor_UnrealEd!UEditorEngine::Tick() editorengine.cpp:1123 UE4Editor_UnrealEd!UUnrealEdEngine::Tick() unrealedengine.cpp:370 UE4Editor!FEngineLoop::Tick() launchengineloop.cpp:2644 UE4Editor!GuardedMain() launch.cpp:142 UE4Editor!GuardedMainWrapper() launchwindows.cpp:126 UE4Editor!WinMain() launchwindows.cpp:200 UE4Editor!__scrt_common_main_seh() exe_common.inl:264 kernel32!<Unknown> ntdll!<Unknown>
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