tree f9edf490c8c3f23c6147c34c7581cb0fce1ce337
parent 9ca64edcbdfed64ffdde5505304111348a53b79b
author Googler <noreply@google.com> 1615822889 -0700
committer Copybara-Service <copybara-worker@google.com> 1615822962 -0700

Prevent NullPointerException when mainArtifact is not defined

I failed to write unit tests to reproduce the NPE.
This requires more investigation.

PiperOrigin-RevId: 362948108