VimCalc can't wok with clang_complete plugin

I'm very like the vimcalc plugin, but I find it can't no work will with calng_complete plugin. for example, if I open a c source file and my clang_complete plugin will work automatic. at this time if I use :Calc command to open a **VCALC** buffer to coculate. then with I input a expression and press key then the vimCalc will crash. I think this is cause by clang_complete auto work in vimcalc running time. but I do not learn python, so I can fix it by myself. so dear gregsexton, could you fix this bug to make the vimCalc work more great? thanks here.