tree 0d36d76dbfd381bcb6d73708420b0a5f491af6d6
parent 399a74f138d2b9124c0e536c5513df62d18e82a6
author Stephen Li <stephenli@google.com> 1496345339 -0700
committer Stephen Li <stephenli@google.com> 1496345735 -0700

Correctly throw error instead of NPE if topic is empty.

Change-Id: I0d7291bdd1dec690077026ee1498272f154a8b90