merges r22655,r22658,r22660 and r22661 from trunk into ruby_1_9_1.

--
* file.c (file_load_ok): checks if regular file, except for the
  platform disallows to open directories, e.g. cygwin.
  [ruby-dev:38097], [Bug #1221]
--
* file.c (file_load_ok): cygwin allows to open directories.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@22747 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/bootstraptest/test_load.rb b/bootstraptest/test_load.rb
index 18e8cc06a4..e63c93a8f4 100644
--- a/bootstraptest/test_load.rb
+++ b/bootstraptest/test_load.rb
@@ -13,3 +13,15 @@ assert_equal 'ok', %q{
   }.map {|t| t.value }
   vs[0] == M && vs[1] == M ? :ok : :ng
 }, '[ruby-dev:32048]'
+
+assert_equal 'ok', %q{
+  %w[a a/foo b].each {|d| Dir.mkdir(d)}
+  open("b/foo", "w") {|f| f.puts "$ok = :ok"}
+  $:.replace(%w[a b])
+  begin
+    load "foo"
+    $ok
+  rescue => e
+    e.message
+  end
+}, '[ruby-dev:38097]'