1 files changed, 4 insertions, 1 deletions
diff --git a/src/tools/android/java/com/google/devtools/build/android/aapt2/ProtoResourceUsageAnalyzer.java b/src/tools/android/java/com/google/devtools/build/android/aapt2/ProtoResourceUsageAnalyzer.java
index a1cd448827..c91ef65754 100644
--- a/src/tools/android/java/com/google/devtools/build/android/aapt2/ProtoResourceUsageAnalyzer.java
+++ b/src/tools/android/java/com/google/devtools/build/android/aapt2/ProtoResourceUsageAnalyzer.java
@@ -139,7 +139,10 @@ public class ProtoResourceUsageAnalyzer extends ResourceUsageAnalyzer {
         resource.references.forEach(
             r -> {
               referenceLog.put(r, resource);
-              queue.add(r);
+              // add if it has not been marked reachable, therefore processed.
+              if (!reachable.contains(r)) {
+                queue.add(r);
+              }
             });
       }
       // if we see it, it is reachable.