[ruby/fileutils] Fix mkdir_p hanging on Windows when trying to create a file on a offline drive

https://github.com/ruby/fileutils/commit/9cc6a082d7

2 files changed, 9 insertions, 1 deletions

diff --git a/lib/fileutils.rb b/lib/fileutils.rb
index 7eb66dda0c..8ae5266864 100644
--- a/lib/fileutils.rb
+++ b/lib/fileutils.rb
@@ -374,7 +374,7 @@ module FileUtils
       path = remove_trailing_slash(item)
 
       stack = []
-      until File.directory?(path)
+      until File.directory?(path) || File.dirname(path) == path
         stack.push path
         path = File.dirname(path)
       end
diff --git a/test/fileutils/test_fileutils.rb b/test/fileutils/test_fileutils.rb
index e1e2a829c3..4afc8085ef 100644
--- a/test/fileutils/test_fileutils.rb
+++ b/test/fileutils/test_fileutils.rb
@@ -1098,6 +1098,14 @@ class TestFileUtils < Test::Unit::TestCase
     ensure
       Dir.rmdir(drive) if drive and File.directory?(drive)
     end
+
+    def test_mkdir_p_offline_drive
+      offline_drive = ("A".."Z").to_a.reverse.find {|d| !File.exist?("#{d}:/") }
+
+      assert_raise(Errno::ENOENT) {
+        mkdir_p "#{offline_drive}:/new_dir"
+      }
+    end
   end
 
   def test_mkdir_p_file_perm