Subject: bug#35188: catch gnus-summary-save-article errors, even in nndoc groups

From: 積丹尼 Dan Jacobson <[email-masked]>
Date: Sun, 23 Jun 2019 09:08:43 +0800

>  o [gnus-summary-save-article]
>
> has a bug. If the article is gone, the user sees a flash, but is then
> prompted to save it anyway.
>
> Opening nndoc server on nndoc:nnml:mail.misc-26341-ephemeral...done
> No such file or buffer: #<killed buffer>
> No such article (may have expired or been canceled)

< `(setq debug-on-error t)', repeat the bug and post the resulting
< backtrace.

Please try with the above trace.