Curious what the Android 6.0 Marshmallow debug icon will look like when finalized? Probably like the icon you are seeing above. The crew over at myce first discovered the little guy, thanks to a screenshot posted to the Chromium Issue Tracker by a Googler that featured the unfamiliar icon. It certainly looks like a mini Marshmallow and most definitely is not the “M” logo we have seen since the first preview.
Oh, and here it is in an actual screenshot: