BUG #13822: Slave terminated - WAL contains references to invalid page

The following bug has been logged on the website:

Bug reference:      13822
Logged by:          Marek Petr
Email address:      marek.petr@tieto.com
PostgreSQL version: 9.4.5
Operating system:   RHEL6_x86_64
Description:

Several days after one in-place and one out of place upgrade from 9.3 to 9.4
version following event occured on both  environments:

2015-12-15 22:35:18 CET @ WARNING: page 4119662 of relation base/16422/18134
is uninitialized
2015-12-15 22:35:18 CET @ CONTEXT: xlog redo visible: rel 1663/16422/18134;
blk 4119662
2015-12-15 22:35:18 CET @ PANIC: WAL contains references to invalid pages
2015-12-15 22:35:18 CET @ CONTEXT: xlog redo visible: rel 1663/16422/18134;
blk 4119662
2015-12-15 22:35:18 CET @ LOG: startup process (PID 22269) was terminated by
signal 6: Aborted
2015-12-15 22:35:18 CET @ LOG: terminating any other active server process

Once it was TOAST and another regular table.