[e-lang] Semi-bug: No trace from whenResolved block failure

[Kevin Reid]

If I use Ref.whenResolved and ignore its result, then a failure in  
the block is discarded silently:

   ? { Ref.whenResolved(1 <- add(1), def foo(_) { throw("bang") })
   >   "some unrelated value" }
   # value: "some unrelated value"

   ...nothing goes in the tracelog...

It would seem to me to be better, and more uniform, if the throw here  
was logged, just as when the call resulting from an eventual send  
fails, the throw is logged at the same time as it is converted into a  
broken reference.

-- 
Kevin Reid                            <http://homepage.mac.com/kpreid/>