Fix $(dir /foo) for both C++ and Go

1 files changed, 1 insertions, 1 deletions

diff --git a/strutil.cc b/strutil.cc
index 7931e73..99eb163 100644
--- a/strutil.cc
+++ b/strutil.cc
@@ -253,7 +253,7 @@ StringPiece Dirname(StringPiece s) {
   if (found == string::npos)
     return STRING_PIECE(".");
   if (found == 0)
-    return s;
+    return STRING_PIECE("");
   return s.substr(0, found);
 }