It appears that the context override argument for bpy ops does not override but in fact replaces the current context.

I see some commented out lines in blenkernel/intern/context.c:ctx_data_get that would allow checking the original context if the python dictionary lookup fails. I tried uncommenting those and commenting the previous line, but then the program crashes somewhere else (which I guess is why they are commented out).


--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
The attached blend file has a script in the text editor that I would like to execute, but requires editmesh context in a 3d window. Even all of my attempts to supply the entire context I think is needed fails to work. If you can give me a workaround that would make this script work, that'd be good too. But seems that for the convenience of scriptwriters, making the context override really be an override and not a replacement would be ideal.