How to reproduce:
1. Open the attached project named "Case_1127415"
2. Zoom out in the Scene

Expected result: The zoom is stopped before any issues are encountered(Track_1127415_V1)
Actual result: The zoom is not stopped and issues are encountered(Track_1127415_V2)

Not reproducible with: 2017.4.21f1, 2018.3.7f1, 2019.1.0a7
Reproducible with: 2019.1.0a8, 2019.1.0b4, 2019.2.0a6

Notes:
There was a zoom cap in the previous versions (2017.4, 2018.3 and early 2019.1)
Zooming out makes the Scene view window become solid white and then solid black
If zooming out while the 2D mode is enabled the following errors are thrown:

transform.position assign attempt for 'SceneCamera' is not valid. Input position is { NaN, NaN, -Infinity }.
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Screen position out of view frustum (screen pos 767.000000, 374.500000, 289374289547337709462743116699416920064.000000) (Camera rect 0 0 1532 751)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)