When Carve function in Nav Mesh Obstacle is turned on, Unity crashes.

Reproduction steps:
1. Open the attached file;
2. Open the Scene "Repro";
3. Enter Play Mode;
4. Turn off Play Mode;
5. Go to "Obstacle" element Inspector and check function Carve;
6. Enter Play Mode;

Workaround: When you turn on function Carve while being in Play Mode, Unity doesn't crash. But if you press second time Carve function to turn off while being in Play Mode, Unity crashes again. Also, element NavMeshBuilder has the script, where you can comment last lines which set Nav Mesh Agent settings. When it's comment, everything works properly.

Reproduced with 5.5.0xNavMesh.
I can't reproduce it with other versions because it hasn't NavMesh layers.