The Editor crashing while increasing tiles of nav mesh on terrain

[Dreikblack]

1. Create terrain

2. Add nav mesh

3. Click couple times on arrow up on Tiles X in nav mesh properties - crash

[Josh]

I found a situation where it is possible for the terrain to cause a crash in its interaction with the navmesh system. This bug has probably been around for a long time. Will be fixed in tomorrow's build.