This one is easy to reproduce.
- Download project (4.14 binary) here ( Dropbox - MyProject.rar - Simplify your life )
- Open “NewBlueprint” Blueprint located in ThirdPersonBP.
- Select Skeletal Mesh and choose NewAnimationBlueprint as Animation Blueprint for this Skeletal Mesh.
- Add new variable (any kind)
- Compile.
- Crash will appear when using 4.14 build.