The Branched 2015-02-11 x86_64 nightly fails to boot with:
Failed to switch root: Specified switch root path /sysroot does not seem to be an OS tree. os-release file is missing.
Indeed there is no /sysroot/etc/os-release . I believe this is caused by a change to fedora-release:
* Tue Feb 10 2015 Peter Robinson <email@example.com> 22-0.11
- Move os-release to /usr/lib and symlink to etc (rhbz#1149568)
lorax share/runtime-cleanup.tmpl has this:
removefrom fedora-release --allbut /etc/os-release
I'd guess that doesn't work when /etc/os-release is a symlink to /usr/lib/os-release ?
This is an automatic Alpha blocker under the automatic blocker policy:
"Complete failure of any release-blocking TC/RC image to boot at all under any circumstance - "DOA" image (conditional failure is not an automatic blocker)"
*** Bug 1191847 has been marked as a duplicate of this bug. ***
This bug has been fixed for me in todays nightly build.