webrick/utils.rb: get rid of thread leak checker

* lib/webrick/utils.rb (WEBrick::Utils::TimeoutHandler#initialize):
  use WEBrick::Utils::TimeoutHandler::Thread, which is ignored by
  LeakChecker#find_threads, instead of ::Thread to get rid of
  thread leak checker.  since this TimeoutHandler is resident
  during tests because of Singleton, it waits for the next timeout
  if it has any schedules.  in the case of nested timeouts, inner
  timeout does not cancel outer timeouts and then those schedules
  still remain.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53201 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,14 @@
+Sat Dec 19 17:17:04 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/webrick/utils.rb (WEBrick::Utils::TimeoutHandler#initialize):
+	  use WEBrick::Utils::TimeoutHandler::Thread, which is ignored by
+	  LeakChecker#find_threads, instead of ::Thread to get rid of
+	  thread leak checker.  since this TimeoutHandler is resident
+	  during tests because of Singleton, it waits for the next timeout
+	  if it has any schedules.  in the case of nested timeouts, inner
+	  timeout does not cancel outer timeouts and then those schedules
+	  still remain.
+
 Sat Dec 19 14:28:01 2015  Jake Worth  <jakeworth82@gmail.com>
 
 	* ext/zlib/zlib.c (Init_zlib): [DOC] Fix double-word typo and

lib/webrick/utils.rb

@@ -177,8 +177,9 @@ module WEBrick
               @queue.pop
             elsif (wakeup -= now) > 0
               begin
-                Timeout.timeout(wakeup) { @queue.pop }
-              rescue Timeout::Error
+                (th = Thread.start {@queue.pop}).join(wakeup)
+              ensure
+                th&.kill&.join
               end
             end
             @queue.clear