Correctly throw error instead of NPE if topic is empty.

Change-Id: I0d7291bdd1dec690077026ee1498272f154a8b90
5 files changed
tree: 0d36d76dbfd381bcb6d73708420b0a5f491af6d6
  1. src/
  2. .gitignore
  3. BUILD
  4. external_plugin_deps.bzl
  5. LICENSE
  6. LICENSE-re2j