Description of problem:
The boot messages are missing after "Starting Switch Root" message (graphical boot disabled). They are also missing from the /var/log/boot.log file but there are different behaviours seen:

(1) It contains the same messages printed on the boot screen, i.e. the last is 
"Starting Switch Root" followed by <ESC>%G (seen with a hexdump utility like hexdump or xxd)
(2) It contains only <ESC>%G
(3) It is empty

When removing the "quiet" switch from the kernel command line the log seems to be complete (but also contains the kernel messages). All in all it looks like a race condition. Maybe a bug in the parser in rsyslog with escape sequences.

Upstream has already 0.8.14 and the ChangeLog lists some parsing bugs - not sure if this bug is fixed as well in that release.

Version-Release number of selected component (if applicable):
rsyslog-8.10.0-1.fc23.x86_64


How reproducible:
100%

Steps to Reproduce:
1. Boot F23 without rhgb on the kernel command line
2. Watch boot messages
3. Check /var/log/boot.log

Actual results:
Boot messages missing after "Starting Switch Root".
/var/log/boot.log incomplete as well.

Expected results:
All boot messages shown on console and in /var/log/boot.log

Additional info:
Currently I run a rather minimal installation (no graphical desktop) in a QEMU/KVM from SSD. That means boot is very fast. Maybe the timing is different when running not in a VM and on slower storage. Just in case you cannot reproduce the behaviour.