accept_loop_spec.rb: avoid random hang

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66264 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/socket/socket/accept_loop_spec.rb

@@ -16,10 +16,14 @@ describe 'Socket.accept_loop' do
 
   describe 'using an Array of Sockets' do
     describe 'without any available connections' do
+      # FIXME windows randomly hangs here forever
+      # https://ci.appveyor.com/project/ruby/ruby/builds/20817932/job/dor2ipny7ru4erpa
+      platform_is_not :windows do
         it 'blocks the caller' do
           lambda { Socket.accept_loop([@server]) }.should block_caller
         end
       end
+    end
 
     describe 'with available connections' do
       before do