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cmd/vet: Add a warning when := causes a variable name to be shadowed #5634

ianlancetaylor opened this issue Jun 4, 2013 · 1 comment


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commented Jun 4, 2013

The language permits shadowing with := as long as both variables are used after they are
defined.  However, it would be reasonable for go vet to warn if := is used to define a
local variable when there is a local variable of the same name in an enclosing block.

Example: .  A quick glance might  lead one to think
this program would print 2, but it prints 0.

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commented Jun 21, 2013

Comment 1:

This issue was closed by revision golang/tools@331c428.

Status changed to Fixed.

@golang golang locked and limited conversation to collaborators Jun 24, 2016

This issue was closed.

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