Android app crashes when launched in debug mode

For me, it occurred when I have a breakpoint in a nested function. In my case, it was within Runnable.run() {}. Not sure if it happens in other nested functions.

Example:

public class TouchEvent {
    public boolean HandleEvent(MotionEvent Event) {
        new Runnable() { @Override public void run() {
            int i=5;
            i++;
        }};
    }
}

If there is a breakpoint on any line inside the run() func, it crashes with the error A/art: art/runtime/jdwp/jdwp_event.cc:661] Check failed: Thread::Current() != GetDebugThread() (Thread::Current()=0x########, GetDebugThread()=0x########) Expected event thread .

This error occurs the first time the class is encountered, NOT when the breakpoint is hit. So it occurred for me when I stepped into a line that had new TouchEvent();, before any of the TouchEvent's code was run (before the constructor).

The solution is to remove the break point (and put it elsewhere).

Edit:

Forgot to mention, it seems to be tied to API25, but has been reported for API26 and API27 too.

Edit:

Another solution is to disabled Instant Run, but please give @toobsco42 credit for that below.

In my case i had to disable Instant Run. It seems like Instant Run has all sorts of side effects and this can be one of them.