Under Windows, setting a breakpoint on the original controller source did not cause the app to break where expected.
Setting a breakpoint on the generated controller source works.
Attached the 'Resources/alloy/controllers/index.js' generated file.
1) Set a Breakpoint at line 2 ( alert($.label.text + a); )
2) Debug for Android
Result: Breakpoints are ignored
3) Check the source map with command (from the build folder):