**System Information**
Win7 x64
**Blender Version**
Broken: 2.74 RC1
Worked: 2.73
**Short description of error**
When importing a mesh, that imports properly in 2.73, it doesn't work on 2.74. Memory usage is much higher than on 2.73 and memory is not released. After failed import, the default scene needs 1.8Gb of memory.
**Exact steps for others to reproduce the error**
I can't attach the obj as it is a commercial one, maybe on a trustable way, I could deliver it for debugging purpose only.
Here is the log from blender:
```
Warning Cannot scanfill, fallback on a triangle fan.
Warning Cannot scanfill, fallback on a triangle fan.
...
*** User note: the console was filled with it so it happened many times ***
...
Warning Cannot scanfill, fallback on a triangle fan.
Warning Cannot scanfill, fallback on a triangle fan.
Traceback (most recent call last):
File "D:\blender-2.74-rc1-windows64\2.74\scripts\addons\io_scene_obj\__init__.py", line 144, in execute
return import_obj.load(self, context, **keywords)
File "D:\blender-2.74-rc1-windows64\2.74\scripts\addons\io_scene_obj\import_obj.py", line 1098, in load
dataname,
File "D:\blender-2.74-rc1-windows64\2.74\scripts\addons\io_scene_obj\import_obj.py", line 629, in create_mesh
edges = [get((verts[vidx1], verts[vidx2])) for vidx1, vidx2 in fgon_edges]
File "D:\blender-2.74-rc1-windows64\2.74\scripts\addons\io_scene_obj\import_obj.py", line 629, in <listcomp>
edges = [get((verts[vidx1], verts[vidx2])) for vidx1, vidx2 in fgon_edges]
ValueError: edges.get(...): found the same (BMVert) used multiple times
location: <unknown location>:-1
location: <unknown location>:-1
```