[Rails] Re: breakpoint not working

[Florian Groß]

Florian Groß wrote:

> Does the problem still occur when you use something else instead of 
> WEBrick? I think I've traced this whole thing to the handlers being run 
> in a $SAFE=4 context so far. But I don't know why such a thing would 
> happen.

I think I've traced this further. If you use .call on a tainted method 
it will be run inside a $SAFE=4 context. I still don't know why the 
methods should be tainted, but you can try these changes and report the 
result:

Index: C:/dev.svn/ruby/breakpoint/breakpoint.rb
===================================================================
--- C:/dev.svn/ruby/breakpoint/breakpoint.rb	(revision 41)
+++ C:/dev.svn/ruby/breakpoint/breakpoint.rb	(working copy)
@@ -122,6 +122,7 @@
      # in the context of the client.
      class Client
        def initialize(eval_handler) # :nodoc:
+        eval_handler.untaint
          @eval_handler = eval_handler
        end

@@ -288,6 +289,8 @@
      def collision
        sleep(0.5) until @collision_handler

+      @collision_handler.untaint
        @collision_handler.call
      end

@@ -299,6 +302,7 @@

        sleep(0.5) until @handler

+      @handler.untaint
        @handler.call(workspace, message)
      end


Index: C:/dev.svn/ruby/breakpoint/breakpoint_client.rb
===================================================================
--- C:/dev.svn/ruby/breakpoint/breakpoint_client.rb	(revision 40)
+++ C:/dev.svn/ruby/breakpoint/breakpoint_client.rb	(working copy)
@@ -149,9 +149,15 @@
      service = DRbObject.new(nil, Options[:ServerURI])

      begin
-      service.eval_handler = Handlers.method(:eval_handler)
-      service.collision_handler = Handlers.method(:collision_handler)
-      service.handler = Handlers.method(:breakpoint_handler)
+      ehandler = Handlers.method(:eval_handler)
+      p [ehandler, ehandler.tainted?]; ehandler.untaint
+      chandler = Handlers.method(:collision_handler)
+      p [chandler, chandler.tainted?]; chandler.untaint
+      handler = Handlers.method(:breakpoint_handler)
+      p [handler, handler.tainted?]; handler.untaint
+      service.eval_handler = ehandler
+      service.collision_handler = chandler
+      service.handler = handler

        reconnecting = false
        if Options[:Verbose] then