Comment 7 for bug 1073983

as for strace, don't think you may conclude from 'open' or 'access' it's loaded into the Emacs lisp space.

from info:

`-Q'
`--quick'
     Start emacs with minimum customizations. This is similar to using
     `-q', `--no-site-file', `--no-site-lisp', and `--no-splash'
     together. This also stops Emacs from processing X resources by
     setting `inhibit-x-resources' to `t' (*note Resources::).

Which doesn't mean other operations preparing the session aren't done.

Maybe set (debug-on-error t), (debug-on-quit t) and post the output again.