Unreal Engine Issues

Editor Crash when adding element to TMap with FIntVector key

Declaring a TMap with an FIntVector key (ex: TMap<FIntVector, int32>) will cause the editor to crash when adding an element to the map. ...

~FStaticMesh() can crash with race condition

UDN user reported frequent crashes in FStaticMesh::~FStaticMesh() on DrawListLinks[i]->Remove(false); Crash went away after adding critical sections to FStaticMesh::LinkDrawList(), FStaticMesh::Unl ...

Crash when creating a key in a blackboard with a name longer than 1024 characters

Black board key names that are longer than 1024 characters will cause a crash ...

Root Motion does not work with Sub Anim Instances

Root Motion does not work with Sub Anim Instances. Note: "Root Motion from Everything" is enabled on the Sub and Top AnimBPs ...

FPropertyEditorInlineClassFilter confusing (and wrong) IsA semantics

FPropertyEditorInlineClassFilter IsUnloadedClassAllowed and IsClassAllowed use the confusing IsA semantics. In the IsUnloadedClassAllowed, the usage seems wrong completely. It seems like the real i ...

uncaught exception: out of memory after launching project onto HTML5 (32-bit browsers)

First person template project is struggling to run on Firefox 32-bit Version 52.0.1 and eventually throws an "uncaught exception: out of memory" error. Occurs in both BP and C++ projects. May be a ...

Pin wires do not connect correctly after collapse to function and duplication

Pin wires do not connect correctly after collapse to function and duplication. Any node can cause this issue, I used an INT variable because it was quick to test with. Regression: This issue affect ...

USkinnedMeshComponent::FindClosestBone does not respect bRequirePhysicsAsset parameter

A licensee has reported that the USkinnedMeshComponent::FindClosestBone function does not respect the bRequiresPhysicsAsset parameter, resulting in the bone returning bones that are not part of the ...

No warning is shown when a disabled mobile shader permutation is required for rendering

Toggling ULevelStreaming::bShouldBeVisible causes replication errors

Looks like the replication system doesn't properly account for bShouldBeVisible. Once a level has be marked bShouldBeVisible=false on the server, the level is completely cleaned up and all actor cha ...