But my objection is that for(1..3) construct doesn't do aliasing

That's not true. Exactly the same aliasing occurs for both for(1..3) and for(1).

"intentionally returns a modifiable value (in a sense) some of the times" mean

Intentionally coded to return a value that can be changed without causing a read-only error.

In reply to Re^15: ref to read-only alias ... why? (notabug) by ikegami
in thread ref to read-only alias ... why? by dk

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