compare_tor_addr_to_addr_policy assertion error

Occasionally, usually after tor fetches its directory microdescriptors or when I "wake" tor up after a long time of inactivity, I get the following error:

compare_tor_addr_to_addr_policy(): Bug: policies.c:716: compare_tor_addr_to_addr_policy: Assertion port != 0 failed; aborting.

After which tor exits. This didn't happen before (and I have been with this version of tor for a long time), though I've had this error twice in a week now, so thought to report it.

Trac:
Username: mr-4