Fix ReferenceEquality and BoxingComparator ErrorProne warnings

PiperOrigin-RevId: 969841008
Change-Id: Id7fa8e274db48b1c89b5f1e4b3c1cdbb51675932

src/main/java/com/google/devtools/build/lib/remote/util/DigestUtil.java

diff --git a/src/main/java/com/google/devtools/build/lib/remote/util/DigestUtil.java b/src/main/java/com/google/devtools/build/lib/remote/util/DigestUtil.java
index 6c0cf29..cecc580 100644
--- a/src/main/java/com/google/devtools/build/lib/remote/util/DigestUtil.java
+++ b/src/main/java/com/google/devtools/build/lib/remote/util/DigestUtil.java
@@ -47,7 +47,7 @@
 public class DigestUtil {
   public static final Comparator<Digest> DIGEST_COMPARATOR =
       comparing(Digest::getHashBytes, ByteString.unsignedLexicographicalComparator())
-          .thenComparing(Digest::getSizeBytes);
+          .thenComparingLong(Digest::getSizeBytes);
 
   private final XattrProvider xattrProvider;
   private final DigestHashFunction hashFn;

src/main/java/com/google/devtools/build/lib/rules/cpp/CcStarlarkInternal.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcStarlarkInternal.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcStarlarkInternal.java
index f5efff0..d58b5ad 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcStarlarkInternal.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcStarlarkInternal.java
@@ -1128,7 +1128,7 @@
       documented = false,
       parameters = {@Param(name = "fn")})
   public void checkToplevel(StarlarkFunction fn) throws EvalException {
-    if (fn.getModule().getGlobal(fn.getName()) != fn) {
+    if (!Objects.equals(fn.getModule().getGlobal(fn.getName()), fn)) {
       throw Starlark.errorf("Passed function must be top-level functions.");
     }
   }