ruby-debug#137 fix warnings on thread aliasing

Author: valich

lib/ruby-debug-ide/thread-alias/alias_thread.rb

@@ -2,11 +2,25 @@ module Debugger
   module TimeoutHandler
     class << self
       def do_thread_alias
-        load File.expand_path(File.dirname(__FILE__) + '/thread-alias/alias_thread.rb')
+        if defined? ::OldThread
+          Debugger.print_debug 'Tried to re-alias thread for eval'
+          return
+        end
+
+        Object.const_set :OldThread, ::Thread
+        Object.send :remove_const, :Thread
+        Object.const_set :Thread, ::Debugger::DebugThread
       end
 
       def undo_thread_alias
-        load File.expand_path(File.dirname(__FILE__) + '/thread-alias/unalias_thread.rb')
+        unless defined? ::OldThread
+          Debugger.print_debug 'Tried to de-alias thread twice'
+          return
+        end
+
+        Object.send :remove_const, :Thread
+        Object.const_set :Thread, ::OldThread
+        Object.send :remove_const, :OldThread
       end
     end
   end