I've a very strange bug when I try to build with QtCreator.
When I try to build in the Compile Output I've this line repeated infinite times.
C:\Qt\5.1.0\mingw48_32\bin\qmake.exe -spec win32-g++ CONFIG+=debug CONFIG+=declarative_debug CONFIG+=qml_debug -o Makefile ..\project\project.pro
The same problem occurs on my computer from time to time too. I found out it is caused by the .pro file having the file date-time in the future (due to some bug in syncing program).
Setting the .pro file time to now, for example by editing it in Qt Creator, solves the problem.