**System Information**
OSX 10.10.5 GTX750m
**Blender Version**
Broken: 2.75.4 7fab7b6
Worked: (optional)
**Short description of error**
When using Shift+B to zoom in to an object in a viewport that already has a render border set (Ctrl+B) Blender crashes.
**Exact steps for others to reproduce the error**
Open attached blend file, do Shift+B over the cube.
{F231661}