I had just spent 15 minutes resetting all of the beautify options and got the following slick-C stack.
I opened Tools->Options, choose C language and Formatting, clicked Edit, made tons of changes, then clicked on 'OK' to close out that edit window, clicked on 'OK' for the options window and got this stack. I think all of my settings are still around after closing SE and restarting it but wanted to report this stack in case it helped debug it for future.