Martin,
>> Have you tried Laurent's test case on Mac? (the version previous to my >>> refactorings, so we eliminate the OS layer). This bug should manifest there >>> too. Unfortunately, I don't have such environment to test and debug. >>> >> >> Yes, it is not reproduced on macos, at-least not so easy like on win/lin. >> > > I should have said, the first version of Laurent's test [1]. Perhaps some > tweaks are still needed; we need a test that artificially injects the > events and does not depend on the OS UI subsystem. But the problem should > be there too. > I will run my initial reproducer test on macOS New Sierra with OpenJDK11 now and tell you its results. PS: could you tell me what lines to change to discard non sequenced events in your patch ? I will then try it Cheers, Laurent >