BUG #14050: "could not reserve shared memory region" in postgresql log

The following bug has been logged on the website:

Bug reference: 14050
Logged by: Mathias Schuch
Email address: mschuch(at)avaya(dot)com
PostgreSQL version: 9.3.5
Operating system: Windows 7
Description:

I see the following entries in the log file on customer site:

2016-03-16 14:44:27 EST LOG: database system is ready to accept
connections
2016-03-16 14:44:27 EST LOG: autovacuum launcher started
2016-03-16 14:45:27 EST LOG: could not reserve shared memory region
(addr=0000000001BB0000) for child 00000000000004CC: error code 487
2016-03-16 14:45:27 EST LOG: could not fork autovacuum worker process: A
blocking operation was interrupted by a call to WSACancelBlockingCall.

2016-03-16 14:45:28 EST LOG: could not reserve shared memory region
(addr=0000000001BB0000) for child 000000000000047C: error code 487
2016-03-16 14:45:28 EST LOG: could not fork autovacuum worker process: A
blocking operation was interrupted by a call to WSACancelBlockingCall.

I read in the release notes that this issue should be solved with 9.3.4 but
with 9.3.5 it isn't.