FYI: I have seen one rc0.git9 early boot crash

[Bruno Wolff III]

On Fri, Oct 17, 2014 at 20:14:02 +0200,
  poma <pomidorabelisima at gmail.com> wrote:
>On 16.10.2014 17:35, Bruno Wolff III wrote:
>> I didn't have time to futz with things further this morning, but one of
>> three machines I tried 3.18.0-0.rc0.git9.2.fc22.1 crashed very early
>> in the boot process. Since I was in a hurry I just tried
>> 3.18.0-0.rc0.git8.2.fc22.1 and it worked.
>>
>> I probably won't get a chance to play with it tonight, but if I can
>> get consistent failures (with whatever the latest version is when
>> I do get time), I'll open a bug.
>
>
>See if it relates to grubby.

I believe it does. This issue just got wider announcement as test is 
affected now, though it hit rawhide a bit further back.