--- Operating System, Graphics card ---
ubuntu 12.04 64bits , Nvidia QuadroFX3500

--- Blender version with error, and version that worked ---
revision57777

--- Short description of error ---
Blender crashes if you try to do a freestyle render with an environment map used by an object of the scene.
It could be cool to have freestyle lines as reflections of objects.
But environment map render does not support Freestyle and it generates a crash.
Panoramic camera is not supported by freestyle, too. But now, there is no crash, just a warning.

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Open attached .blend file.
Press F12 -> crash.