Short description of error
Double Tap the 'g' key will crash Blender every time for me. Which vertex is selected doesn't matter. They all crash it. If all the Vertex Groups, UV Maps, and Vertex Colors are deleted than the crashes stop.
Note: All but one of those vertex attributes were added in there automatically from joining and separating the object with other parts of the set at various times, they were never intended to be a part of this object. Uninitialized data I guess?
Exact steps for others to reproduce the error
Open the attached .blend and try to slide a vertex.