Crash upon adding an Interface to a Blueprint that has a function name that matches the name of a variable in the Blueprint.

UE - Gameplay - Blueprint Compiler - Oct 13, 2017

When you add an Interface to a Blueprint that contains a variable with the same name as one of the Interface's functions, the editor will crash upon compiling the blueprint. In 4.16, this only cause ...

Engine Crashes When Building Lighting if Precomputed Visibility Aggressiveness is set to VIS Max

UE - Graphics Features - Nov 30, 2017

The engine crashes when building lighting if World Settings >> Precomputed Visibility >> Visibility Aggressiveness is set to "VIS Max." A Fatal Error message sometimes appears (screen shot attached) ...

Attached Project Crashes When Moving Child Actor Components in Blueprints

UE - Gameplay - Blueprint - May 3, 2016

The editor crashes when moving a child actor component in the blueprint viewport. This has not been reproduced in a clean project, and only seems to be occurring in the user project where they have ...

Crash when implementing interface to child blueprint and then implementing it with parent blueprint

UE - Gameplay - Blueprint - Jul 11, 2016

If the user uses a Blueprint Interface in children Blueprints and then goes to the parent Blueprint and tries to implement the same Blueprint Interface in the parent Blueprint, the editor will crash ...

Animation Modifiers that contain a null Animation Sequence value cause the Engine to crash when applied to an Animation Sequence

OLD - Anim - Nov 14, 2018

When an Animation Modifier passes a null Animation Sequence value to an Animation Sequence the Editor will crash. This is a regression from 4.20.3 (CL-4369336). This was reported and tested in 4.21 ...

Crash retargeting an animation blueprint with a RigidBody node

UE - Simulation - Physics - Feb 17, 2017

Crash occurs when the user attempts to retarget an animation blueprint that is using a RigidBody node. ...

Crash when splitting up output of collapsed node

UE - Gameplay - Blueprint Compiler - Feb 13, 2017

A crash occurs when splitting the pin of a collapsed vector node that was connected via a vector connection. This issue is very similar to [Link Removed] however, the callstacks are different so I ...

Casting to a child with a self reference can cause a crash

UE - Gameplay - Blueprint - Aug 13, 2015

Casting to the child of a blueprint using the self reference (as the parent) throws a warning. Then placing a self reference anywhere in the event graph of the child by it's self will cause a crash ...

Blueprint with large amount of macros crashes on compile

UE - Gameplay - Blueprint Compiler - Jan 30, 2018

Blueprint compile is crashing in a BP with a large number of macros ...

Crash attempting to use a struct containing a deleted struct in a blueprint and compiling

UE - Gameplay - Blueprint Compiler - Sep 21, 2017

REGRESSION: No, occurs in 4.17 (doesn't repro in 4.16 because orphaned pins wasn't a feature) Crash occurs when the user attempts to use a struct containing a deleted struct in a blueprint. ...