Repro steps:

1. Open the provided scene
2. Open the script
3. Press the "Play" button in MonoDevelop
4. Add a breakpoint on line 10 (where the vector2 is declared)
5. Enter play mode in Unity
6. Press the "Step over" button in MonoDevelop
7. Hover over the "v" in "Vector2 v =..." until a menu pops up
8. Expand the pop up menu
9. See that the values have changed to nonsense

Expected: to see the same values as declared before.

Actual: the values have changed drastically

Reproduced with: 2017.1.0a6, 5.6.0f3, 5.5.3f3

Working with: 5.4.5f1 (regression here)

Bug only happens on a mac