When I open a few C files in gvim, and switch between different buffers few times, after a little bit i'm getting this error and syntax coloring breaks. If I reopen the file, syntax coloring goes back, but after a few buffer switching i'm getting the same problem. :CCerror says there is no error, unfortunatly I don't know how to get more debug information for this case, E315 as I know it vim's internal error, but if i disable color coded even by :CCtoggle the error goes away. I use vim compiled from git, let me know if I can provide any more useful information. This always reopening a file is pretty annoying.