Hi tty,

> On Sep 12, 2020, at 7:18 AM, gettimothy via Squeak-dev <squeak-dev at lists.squeakfoundation.org> wrote:
> 
> 
> Ignore if spam...

It’s not spam.

> 
> 
> It is interesting that I can reset a class instance variable inside one of the methods of a class with a doit.
> However, I cannot do it from a Workspace .

The creasing is that doits always happen in the context of a specific receiver and different contexts have different receivers.  Trace Compiler class>>#evaluate: down and you’ll see where the receiver is supplied before the Compiler instance is created.

In a Workspace the receiver is nil.
In an Inspector the receiver is the object being inspected 
In an explorer the receiver is the currently selected object (IIRC)
In a browser the receiver is the currently selected class (or nil if none selected, or the current method’s class in a method list browser)

And within a doit (naturally since a doit is simply an anonymous method) all the inst cars if the receiver are in scope.  Since nil has no inst vars there are no inst vars in scope in a workspace.


> 
> 
> TemplateTitleWords := nil  from within the method area works (surprising, but very handy).
> WikitextTemplates TemplateTitleWords :=  nil.  does not (as expected)
> 
> I expect the latter, I am surprised by the former.
> 
> Don't get me wrong, it is a handy feature , but if it is a bug, here is a heads up.
> 
> cheers,
> 
> tty
> 
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20200912/7a8a31cb/attachment.html>