Steps to reproduce

This is a mixed report.

I caught php 5.6 being broken since composer 1.1.0 includes a new autoload_static file for php5.6+ but the script was created but it didn't create the file causing T135635

To resolve that we had to use composer 1.0.3 to regenerate it.

But if we had some instances testing against repos such as mediawiki core we could prevent this error from coming back. Due to composer 1.1.0 breaking lint on ci.