Correctly remove temporary directory if path yielded is mutated

Another approach would be to freeze the string, but that could
cause backwards compatibility issues.

Fixes [Bug #16918]

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/tmpdir.rb b/lib/tmpdir.rb
index c61365577e..e6cb327fc7 100644
--- a/lib/tmpdir.rb
+++ b/lib/tmpdir.rb
@@ -86,7 +86,7 @@ class Dir
     }
     if block_given?
       begin
-        yield path
+        yield path.dup
       ensure
         unless base
           stat = File.stat(File.dirname(path))