Add @Nullable annotations to PackageFunction#progressReceiver.

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PiperOrigin-RevId: 147202629
MOS_MIGRATED_REVID=147202629

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/skyframe/PackageFunction.java b/src/main/java/com/google/devtools/build/lib/skyframe/PackageFunction.java
index 7b3b1c6e96..1941489a77 100644
--- a/src/main/java/com/google/devtools/build/lib/skyframe/PackageFunction.java
+++ b/src/main/java/com/google/devtools/build/lib/skyframe/PackageFunction.java
@@ -94,7 +94,7 @@ public class PackageFunction implements SkyFunction {
   private final Cache<PackageIdentifier, CacheEntryWithGlobDeps<AstAfterPreprocessing>> astCache;
   private final AtomicBoolean showLoadingProgress;
   private final AtomicInteger numPackagesLoaded;
-  private final PackageProgressReceiver packageProgress;
+  @Nullable private final PackageProgressReceiver packageProgress;
   private final Profiler profiler = Profiler.instance();
   private final Label preludeLabel;