Feature #8691: Add warning for variable that is re-assigned but not re-used

• Status: Closed
• Assignee: -
• Target version: -

[agrimm (Andrew Grimm)]

The following code

def reassigned_unused
a = 42
b = a.to_s
a = 56
b
end

Does not currently generate an "assigned but unused variable" warning about the second assignment to "a".

Is it feasible to create a warning for such a scenario?

[agrimm (Andrew Grimm)]

A third party tool that I use, called Rubocop, has implemented such functionality. https://github.com/bbatsov/rubocop/issues/458

So I don't really require this functionality in MRI any more.

[zzak (zzak _)]

• Status changed from Open to Feedback

@andrew should we close this ticket then?

[agrimm (Andrew Grimm)]

Yes, close the ticket. If someone else wants the functionality, or has implemented the functionality and wants to submit a patch, they can open another ticket.

[zzak (zzak _)]

• Status changed from Feedback to Closed

closing, see ruby-core:57091