Operating system or device, Godot version
Linux Mint 18.2 Cinnamon x64 - Godot master 28c8592

Issue description:
A project of mine will just crash Godot upon opening it. Attempts to debug with gdc did not pan out as I'm an idiot who is bad at computer

The issue was introduced in 28c8592, but it can be replicated even in the latest commit as of this point (e8b05ca)

Steps to reproduce:

1. Import the project linked below
2. Attempt to open it

Link to minimal example project:
3D platformer.zip