How to reproduce:
1. Open the attached project

Actual result: Unity crashes.

Notes:
The issue is not reproducible if TextMeshPro plugin inside the project is deleted.
The issue is not reproducible if TextMeshPro package isn't present in the project.

Reproducible with: 2019.2.0a1, 2019.1.0a14, 2019.1.0a10.
Regression introduced in: 2019.1.0a10.
Not reproducible with: 2019.1.0a9, 2019.1.0a1, 2018.3.3f1, 2018.2.20f1.

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Fixed in 2019.2, 2019.1.0b8.