System Information
Win7 Ultimate 64-bit
Two GeForce 650 (non SLI)
Phenom II x6
16GB RAM
All latest drivers as of 8 May 2014

Blender Version
Broken: 2.70 (the main release downloaded from Blender.org)

Short description of error
Blender crashes when all of this very specific set of circumstances is true:
There are more than 1 scene in the blend file,
and
One scene is set up to render any render layer from another scene in the file,
and
The scene doing the rendering is using a file output node,
and
The scene being rendered has "Save Buffers" turned ON in the render settings.

Exact steps for others to reproduce the error
Open the attached blend fail and press F12 while in the scene called "rendering."

To prevent the crash, do ANY ONE (or all) of the following:

• Remove the file output node from the scene called "rendering"
• Remove the other scene from the compositing setup in "rendering"
• Render the other scene from the compositor by clicking the camera button on its render layers node
• Uncheck "Save Buffers" in the render settings of the other scene

This occurs with both the Blender Internal renderer and Cycles, as well with both CPU and GPU computation in the Cycles renderer.