How to reproduce:
1. Open the attached Unity project.
2. Reimport a "camera.abc" model.
3. If the crash does not happen, reimport all assets and repeat step nr. 2.

Expected result: The model is reimported
Actual result: Unity crashes

Regression first introduced in - 2018.2.0a1
Reproducible with - 2018.2.0f2, 2018.2.0a1
Not reproducible with - 2018.3.0a5, 2018.1.9f1, 2017.4.7f1, 2017.2.3p2, 2017.1.4p2, 2017.1.0a1

Notes:
- The Alembic importer seems to crash during the import of a particular model when accessing its animation time range.
- Those versions, which are marked as "Not reproducible", only crash if the crash in 2018.2.0f2 has happened before.