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in reply to Re^9: ref to read-only alias ... why? (notabug)
in thread ref to read-only alias ... why?

The literal 123 should return a modifiable value.

Could you elaborate on that please? I don't find that neither convincing nor intuitive. If that's true, why error message "Modification of a read-only value" exists at all? By the same logic 123++ should be working fine, no?