This happens in all projects for me. When I create a signed apk from Android Studio, I get the following message, which is correct:

Problem:. After that, I keep getting this message for every build that happens for a project when I actually don't create a signed apk.
I checked the destination folder to see if apk is really being created, but it is not. Then why am I getting a message? After rebooting Android Studio, it stops.
Is this the wrong configuration in the project or settings, or is it a bug in Android Studio? I am using Android Studio 1.5.1
Update: I do not want to disable lint and suppress this problem. I was really looking for a real fix (maybe configuration or settings change in IDE or gradle )
As mentioned in the answer I accepted, by user2082415, this is a bug in Android Studio . Now I follow the error report and update this post if there is a solution.
Here is the link to the error report
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