1 files changed, 1 insertions, 6 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/buildtool/SymlinkForest.java b/src/main/java/com/google/devtools/build/lib/buildtool/SymlinkForest.java
index 3f9ac667fc..bcea3d8ae5 100644
--- a/src/main/java/com/google/devtools/build/lib/buildtool/SymlinkForest.java
+++ b/src/main/java/com/google/devtools/build/lib/buildtool/SymlinkForest.java
@@ -26,7 +26,6 @@ import com.google.devtools.build.lib.util.Preconditions;
 import com.google.devtools.build.lib.vfs.FileSystemUtils;
 import com.google.devtools.build.lib.vfs.Path;
 import com.google.devtools.build.lib.vfs.PathFragment;
-
 import java.io.IOException;
 import java.util.Map;
 import java.util.Set;
@@ -123,11 +122,7 @@ class SymlinkForest {
           continue;
         }
         PackageIdentifier dir = createInRepo(pkgId, pkgId.getPackageFragment().subFragment(0, i));
-        Set<Path> roots = dirRootsMap.get(dir);
-        if (roots == null) {
-          roots = Sets.newHashSet();
-          dirRootsMap.put(dir, roots);
-        }
+        Set<Path> roots = dirRootsMap.computeIfAbsent(dir, k -> Sets.newHashSet());
         roots.add(pkgRoot);
       }
     }