How to configure qt creator to show C++ codes rather than disassembler?

Question

Yesterday I had done a lot of things like updating GCC,Clang and reinstalling Qt Creator.Today when debugging my codes step by step, the debugger was showing the disassembler r

Answer 1

At last, I found that it was Clang that had caused this problem. After changed the kit back to using gcc, it just worked fine. But not sure whether it's Clang's fault or that the script Qt produced for compiling has any problem. Anyway just put the answer here in case anyone else who might encounter the same situation.