Subject: bug#12972: [PATCH] Avoid regression in mailcap-view-file similar to Bug#44824

From: Maxim Nikulin <[email-masked]>
Date: Fri, 2 Jul 2021 23:24:23 +0700

On 02/07/2021 19:37, Eli Zaretskii wrote:
>> From: Maxim Nikulin
>> Date: Fri, 2 Jul 2021 19:21:55 +0700
>> Cc: Lars Ingebrigtsen
>>
>>> And with other handlers, this could be an
>>> incompatible behavior change if the handler behaves differently when
>>> its standard handles are connected to a pipe rather than a terminal
>>> device.
>>
>> Example of such handler, please.
> 
> Why do you need one?

Because of I can not imagine such case for mailcap handler in Emacs yet 
and, accordingly to you, "this could be an incompatible behavior change".