* backport r33007 from trunk.

* lib/net/imap.rb (idle): raises a Net::IMAP::Error when the
  connection is closed.  based on the patch by Hugo Barauna.
  [Bug #5190] [ruby-core:38930]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@33008 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Fri Aug 19 14:12:57 2011  Shugo Maeda  <shugo@ruby-lang.org>
+
+	* backport r33007 from trunk.
+
+	* lib/net/imap.rb (idle): raises a Net::IMAP::Error when the
+	  connection is closed.  based on the patch by Hugo Barauna.
+	  [Bug #5190] [ruby-core:38930]
+
 Fri Aug 19 11:28:58 2011  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* backport r33001 from trunk.

lib/net/imap.rb

@@ -905,10 +905,15 @@ module Net
           @idle_done_cond = new_cond
           @idle_done_cond.wait
           @idle_done_cond = nil
+          if @receiver_thread_terminating
+            raise Net::IMAP::Error, "connection closed"
+          end
         ensure
-          remove_response_handler(response_handler)
+          unless @receiver_thread_terminating
-          put_string("DONE#{CRLF}")
+            remove_response_handler(response_handler)
-          response = get_tagged_response(tag, "IDLE")
+            put_string("DONE#{CRLF}")
+            response = get_tagged_response(tag, "IDLE")
+          end
         end
       end
 
@@ -1056,6 +1061,7 @@ module Net
         rescue Exception
         end
       }
+      @receiver_thread_terminating = false
     end
 
     def receive_responses
@@ -1115,8 +1121,12 @@ module Net
         end
       end
       synchronize do
+        @receiver_thread_terminating = true
         @tagged_response_arrival.broadcast
         @continuation_request_arrival.broadcast
+        if @idle_done_cond
+          @idle_done_cond.signal 
+        end
       end
     end
 

test/net/imap/test_imap.rb

@@ -363,6 +363,61 @@ class IMAPTest < Test::Unit::TestCase
     end
   end
 
+  def test_connection_closed_during_idle
+    server = create_tcp_server
+    port = server.addr[1]
+    requests = []
+    sock = nil
+    Thread.start do
+      begin
+        sock = server.accept
+        sock.print("* OK test server\r\n")
+        requests.push(sock.gets)
+        sock.print("+ idling\r\n")
+      rescue
+      end
+    end
+    begin
+      imap = Net::IMAP.new(SERVER_ADDR, :port => port)
+      begin
+        th = Thread.current
+        m = Monitor.new
+        in_idle = false
+        exception_raised = false
+        c = m.new_cond
+        Thread.start do
+          m.synchronize do
+            until in_idle
+              c.wait(0.1)
+            end
+          end
+          sock.close
+          exception_raised = true
+        end
+        assert_raise(Net::IMAP::Error) do
+          imap.idle do |res|
+            m.synchronize do
+              in_idle = true
+              c.signal
+              until exception_raised
+                c.wait(0.1)
+              end
+            end
+          end
+        end
+        assert_equal(1, requests.length)
+        assert_equal("RUBY0001 IDLE\r\n", requests[0])
+      ensure
+        imap.disconnect if imap
+      end
+    ensure
+      server.close
+      if sock && !sock.closed?
+        sock.close
+      end
+    end
+  end
+
   private
 
   def imaps_test