Re: [PATCH] block: Remove trailing newline in format used by error_report API

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 6/8/20 6:45 AM, Markus Armbruster wrote:
> Philippe Mathieu-Daudé <philmd@redhat.com> writes:
> 
>> On 2/28/20 6:32 PM, Markus Armbruster wrote:
[...]
>>> warn_reportf_err() is a convenience function to error_prepend(),
>>> warn_report() and free @local_err.
> [...]
>> Why warn_reportf_err() doesn't take a 'Error **err' instead, to set err
>> to NULL after freeing *err?
> 
> Why doesn't free() take a void ** argument, to set the pointer to null
> after freeing what it points to?  Why doesn't close() take an int *
> argument?

=)

Usually I see the code checking an Error* hasn't been set by a callee.
If it has, the caller usually returns.

You explained me warn_reportf_err() consume Error* and free() it.

So regarding the rest of our Error* use, a function calling
warn_reportf_err has to do extra care to set Error* to NULL.

Genuinely looks confuse or dangerous to me...

Note however I was not asking for a change, just asking 'why'
to better understand if there were not a design problem, or
o invalid use of different APIs.

> 
> [...]
>