https://bugs.winehq.org/show_bug.cgi?id=48575
--- Comment #10 from andy andy86@fastwebnet.it --- I did some regression test with wine 3.x and try (but failed due to too old dependencies required) to do regression test with very old version (like 2.x or 1.x, i don't remember well), but I've always do 'make clean' before start every new test and every new build.
Anyway 'git clean' seems an useful command, thank you.