Cannot debug android app in Intellij: “Warning: debug info can be unavailable.”

Question

I am trying to debug an app with Intellij 13.0 on Windows 7. Whenever I start debugging I get the following warning:

Warning: debug info

Answer 1

For those who are using Android-Studio: check your gradle file and product flavours and be sure that "debuggable" attribute in manifest is NOT set to false.