Fix npe when host does not have valid ipv6 address

Change-Id: I411ec372eb16a1a2b5071a79b81af173de25bdbd
(cherry picked from commit 13b2cc62251e15b391f76507a2afc1cb470b6d37)
1 file changed
tree: b4b1e88731811e35b25f2ef2c91e15e0bc0a555c
  1. BUILD
  2. app/
  3. web/