Reproduction steps:

1. Open "ProjectQuestIon.zip" project
2. Build for WebGL
3. Launch the Build
4. Click anywhere in the game window

Expected Result: The game loads successfully
Actual Result: At ~90% of loading, an error appears and the game freezes, "RuntimeError: Overflow"

Fixed in: 2019.1.0a3

Reproduced with: 2019.1.0a2, 2019.1.0a1, 2018.3.0b5, 2018.3.0a1
Did not reproduce on: 2019.1.0a5, 2019.1.0a3 (d70d54), 2018.2.12f1, 2018.1.9f2, 2017.4.13f1