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bug#5950: defvaralias after defvar should be warned in runtime


From: Clément Pit-Claudel
Subject: bug#5950: defvaralias after defvar should be warned in runtime
Date: Thu, 2 Aug 2018 10:37:25 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 2018-08-02 09:28, Noam Postavsky wrote:
> On 2 August 2018 at 09:08, Clément Pit-Claudel <address@hidden> wrote:
> 
>>> Usually the warning is due to the defvaralias call being performed after
>>> the corresponding `defvar`s.
>>
>> Right. But why is that a problem?
> 
> The typical failure case goes like this, user does this:
> 
> (setq the-package-setting 'foo)
> (require 'the-package)
> 
> And the-package.el does this:
> 
> (defvar the-package-real-setting 'bar)
> ;; Oops! User's setting of `foo' is overwritten here:
> (defvaralias 'the-package-setting 'the-package-real-setting)

Thanks.  Should the warning be disabled when both variables are already 
`defvar'd, then?

Clément.





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