[self-interest] UI2 stepProcess infinite blowup and the dangers of not cloning [1 Attachment]

[Russell Allen]

On the other hand I have occasionally wished that it was possible to write a webserver without having to worry about blowing up the UI :)

Russell


On 25/05/2012, at 11:42 PM, David Goehrig wrote:

> [Attachment(s) from David Goehrig included below]
> So I was trying to shoot a screen cast last night of a web server project in Self I wrote and after making some modifications to my image that seemed innocuous I ended up with a blowup in UI2 stepProcess, in which right clicking on basically any element triggers an "Error: first is absent": 
> 
> 
> Error: first is absent.
> Receiver is: a link.
> 
> Then if you click on Stack you get:
> 
> No 'isReflecteeBlockMethodActivation' slot found in a list.
> No 'isReflecteeBlockMethodActivation' slot found in a list.
> Error: first is absent.
> Receiver is: a link.
> UI step failed twice in Self 1(type: worldMorph) -- starting debugger in new world
> 
> Restarting the image in another world, it comes down to something is calling  hashElement: e on an empty list.  
> 
> Well what was going on here?
> 
> So digging deeper I went in and looked at the list... oh wow
> 
> list rep is a link that is pointing to objects which is pointing to a circular list produced by an old version of a typo that was in application!
> 
> How did that happen?
> 
> Well it looks like one of the methods had not been updated and called an old object that was never scavenged that had a copy of the code that did the wrong thing...
> 
> When I ran the web server it called that code, which wasn't in the objects I had been editing..
> 
> So how to fix it?
> 
> Well list rep needs to point to a link that points to itself... done...
> 
> Wow right clicking on anything works again... woot!
> 
> I wish I had this entire thing on the screen grab, but I don't.  It would have demonstrated how incredibly cool Self is where you can debug and alter a live image in the image itself even when you shoot yourself in the foot.
> 
> Dave
> 
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> 
> -=-=-=-=-=-=-=-=-=-=- http://blog.dloh.org/
> 
> 

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