When creating the exec root symlink forest, take account of the empty package's package root when creating top-level directories. Otherwise, if the empty package references files in those top-level directories, they would be hidden.

Fixes #1221

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MOS_MIGRATED_REVID=121392128

1 files changed, 2 insertions, 2 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/vfs/FileSystemUtils.java b/src/main/java/com/google/devtools/build/lib/vfs/FileSystemUtils.java
index d8a198bce4..9ef39736b6 100644
--- a/src/main/java/com/google/devtools/build/lib/vfs/FileSystemUtils.java
+++ b/src/main/java/com/google/devtools/build/lib/vfs/FileSystemUtils.java
@@ -142,8 +142,8 @@ public class FileSystemUtils {
    * contained in 'path'. I.e the closest ancestor directory containing path.
    * Returns null if none found.
    */
-  public static PathFragment longestPathPrefix(PathFragment path, Set<PathFragment> prefixes) {
-    for (int i = path.segmentCount(); i >= 1; i--) {
+  static PathFragment longestPathPrefix(PathFragment path, Set<PathFragment> prefixes) {
+    for (int i = path.segmentCount(); i >= 0; i--) {
       PathFragment prefix = path.subFragment(0, i);
       if (prefixes.contains(prefix)) {
         return prefix;