On Sat, 2 Feb 2019 at 08:35, Sean P. DeNigris <[email protected]> wrote:

> Ben Coman wrote
> > The first was me. Not sure about the second. The latter two were someone
> > else.
>
> I always thought that DNU should be on this list too. Am I the only one?
>

It seem to already do this?  In Playground evaluating...
  1 + 1.
  2 unknown.
  3 + 3

opens a debugger on the second line with "unknown" highlighted.
See <debuggerCompleteToSender> at the top of Object>>doesNotUnderstand:
Or do you mean something else?

cheers -ben

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