> My philosophy is different: because the value can be obtained legally (it is
> almost impossible to detect it when it occurs), I would rather treat is as a
> legal value, e.g. as an empty series. A curiosity:
>

The solution, for me, is to transform every "Out of range" reference to a
series, when evaluated, in a tail reference.

>     append b "a"

tail b works, so works append which uses tail

To catch a little more errors, tail and head should trigger an error.

Try this:

clear head b: next "a" ;== ""
join "a" b   ;  ->>>>>> CRASH "expand series overflow"

---
Ciao
Romano


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