In multiple configurations context, no bundle is created #1513

When we use an array of configuration objects, if one build fails then no bundle files is created.

In this repository, I have a configuration to create a "dist/bundle.js" file and a configuration to create "dist/tests.js" file. If I simulate an error on the build of "dist/tests.js" file then the file "dist/bundle.js" is not created although there is no reason to not generate it