How to reproduce:
1. Open the attached "LineRendererIssue" project
2. Open the "Main" scene and enter playmode
3. Press "F" key to create a line and hold down "G" key for it to follow you along (while pressing W,S,A,D keys)
4. Repeat the third step a few times (issue should appear a second time, most likely)

Expected result: New line is created and it follows along, no errors appear
Actual result: A few "Assertion failed on expression: 'curveT() >= GetRange()...' " and "Assertion failed on expression: 'curveT() >= m_Curve[lhs].time...' " errors appears

Reproducible with - 2017.1.0b1, 5.6.0p1, 5.5.3f1,
Not reproducible with - 5.4.5f1, 5.3.8