Building from git source code repository works fine.
In commit d159fe199fd508.... the examplesinstallpath was changed in the qdocconf files to include the repository name in the examples.
This has a direct influence on the generated example-maifest files used by Qt Creator.
The goal is that Qt Creator expects all examples from the qtbase repo under qtbase/corelib/... e.g. examples related to corelib. The same is for gui, dbus, network, opengl, ....
But the compilation from source code still installs the examples under examples/corelib instead of example/qtbase/corelib which is defined in the manifest files.
As a consequence a full Qt 5.6.0 build and using this in QtCreator shows no examples at all...