* lib/fileutils.rb (FileUtils::Entry_#copy_file): open the source

  file first to ensure it can be copied.  [ruby-core:25498]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24823 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/fileutils.rb b/lib/fileutils.rb
index 2a6b248585..58e3f1d684 100644
--- a/lib/fileutils.rb
+++ b/lib/fileutils.rb
@@ -1261,8 +1261,10 @@ module FileUtils
     end
 
     def copy_file(dest)
-      File.open(dest, 'wb') do |f|
-        IO.copy_stream(path(), f)
+      File.open(path()) do |s|
+        File.open(dest, 'wb') do |f|
+          IO.copy_stream(s, f)
+        end
       end
     end