たびたびすいません、t の初期化を忘れてました。

D:\yarv\lib\ruby\1.9>diff -u thread.rb.org thread.rb
--- thread.rb.org       Wed Feb 15 22:12:34 2006
+++ thread.rb   Fri Feb 17 22:21:15 2006
@@ -290,15 +290,26 @@
   # until space becomes available.
   #
   def push(obj)
+    t = nil
     while true
       @mutex.lock
-      break if @que.length >= @max
+      break if @que.length <= @max
       @queue_wait.push Thread.current
-      @mutex.unlock_and_sleep
+      @mutex.unlock_and_stop
+    end
+    @que.push obj
+    begin
+      t = @waiting.shift
+      t.wakeup if t
+    rescue ThreadError
+      retry
     end
-    super
   ensure
     @mutex.unlock
+    begin
+      t.run if t
+    rescue ThreadError
+    end
   end

   #

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