Uncaught TypeError: Cannot read property 'prototype' of undefined

Please can some one has been able to use IONIC RC5 with Dexie library? IONIC team said that problem seem to come from Webpack or Dexie library.
I say OK, and since my Dexie library have not change because i just have to change app-script 1.0.0 for app-script 0.0.47 to have all thing working perfectly, i can said that the problem can not come from Dexie.
From the two, it is only Webpack witch is used by app-script in the build process.

if there is a change between version of Webpack used in app-script 0.0.47 and the one used in app-script 1.0.0 we can say that this problem come from the newer version of Webpack.

The build is failing with “Uncaught TypeError: Cannot read property ‘prototype’ of undefined” message during execution.