Fix BEP failing to report Artifacts in an output set which includes Filesets.

PiperOrigin-RevId: 252948005
diff --git a/src/main/java/com/google/devtools/build/lib/actions/CompletionContext.java b/src/main/java/com/google/devtools/build/lib/actions/CompletionContext.java
index beb7a30..ae63c83 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/CompletionContext.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/CompletionContext.java
@@ -59,7 +59,7 @@
       if (artifact.isMiddlemanArtifact() || artifact.isFileset()) {
         // We never want to report middleman artifacts. They are for internal use only.
         // Filesets are not currently supported, but should be in the future.
-        return;
+        continue;
       } else if (artifact.isTreeArtifact()) {
         List<Artifact> expandedArtifacts = new ArrayList<>();
         expander().expand(artifact, expandedArtifacts);