System Information
Windows 10
GTX 970

Blender Version
2.79b

Short description of error
When make a command in the main window then I click Shift R in another window after change the Action in Dope Sheet, the blender just crash itself.

How to achieve it:

Create another Window by pressing Shift and the little triangle on the bottom main window
Open the DopeSheet Editor and then select the Action Editor

Create some animation with some bones In 2 different actions
In my case I just created a skeleton with 2 bones connected to one another

If I rotate the bone In Action1 in the main window and go change to Action.001 and stay with the mouse in this new window that I created and press Shit R to replicate the same command, the blender just crash.