QT compilation error

Question

I played with the tiny QT 5.5.1 application under windows / mingw. Suddenly, he stopped compiling with such a strange error as in the screenshot.

I tried to clear everything, rebuild, run qmake. No results.

How to get rid of it?

Answer 1

Well, for all the downvoters, I decided it myself.

The problem was that QT was unable to create the Debug directory where it should put the compiled files. Do not ask me why.

So we have. There is no output directory -> no main.o created -> this strange compilation error.