Clang Code model fill log when file not found

I am running on linux, and when in my project I switch to a branch where a currently opened file is not here, Clang code model fills the file ~/.cache/upstart/startkde.log with the text:

clangbackend.stderr: Error in ClangIpcServer::sendDelayedDocumentAnnotationsTimer: File <path_to_a_file> does not exist in file system!

(I'm talking about 100GB in less than an hour)
Is it possible to fix this ?

(the bug also occurs in a previous version of Qt Creator, I think it was the 3.6.x)