From c414abe13450e2b4e204f6368ba83c8916de1ebd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Mon, 23 Apr 2018 08:23:06 +0200
Subject: Minor code reuse improvement

---
 build2/file.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'build2/file.cxx')

diff --git a/build2/file.cxx b/build2/file.cxx
index 5ffa59a..b0d202c 100644
--- a/build2/file.cxx
+++ b/build2/file.cxx
@@ -829,7 +829,7 @@ namespace build2
       {
         dir_path out_root (root.out_path () / p.second);
 
-        if (!out_base.sub (out_root))
+        if (!out_base.empty () && !out_base.sub (out_root))
           continue;
 
         // The same logic to src_root as in create_bootstrap_outer().
-- 
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