Race condition between project resolving and building

If you change a file and then press Ctrl+S and Ctrl+B right after another, building will start before re-parsing, not taking the changes into account. Subsequent rebuilds will have no effect either, presumably because the time stamp of the build graph after building is now later than the one of the source file.
This is not a theoretical or minor problem, because the "save files before building" mechanism causes the same effect, so users are affected all the time.