1 files changed, 6 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PerActionFileCache.java b/src/main/java/com/google/devtools/build/lib/skyframe/PerActionFileCache.java
index b375facd60..f41272c1c9 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PerActionFileCache.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PerActionFileCache.java
@@ -96,6 +96,12 @@ class PerActionFileCache implements ActionInputFileCache {
   }
 
   @Override
+  public boolean isFile(Artifact input) {
+    // getInputArtifactValue always returns a value when supplied with an Artifact.
+    return getInputFileArtifactValue(input).isFile();
+  }
+
+  @Override
   public boolean contentsAvailableLocally(ByteString digest) {
     return reverseMap.containsKey(digest);
   }