[mu4e bug] "No buffer named *Summary*" when trying to save attachments

[jgoerzen]

Describe the bug

When using mu4e-view-mime-part-action, if I select a part and then hit s to save, I get:

No buffer named Summary

How to Reproduce

As above, use mu4e-view-mime-part-action, select a part, then hit s to save. Backtrace is:

Debugger entered--Lisp error: (error "No buffer named *Summary*")
  gnus-article-part-wrapper(4 mm-save-part)
  gnus-article-save-part(4)
  #f(compiled-function (id) #<bytecode 0x18d1a58f937e8e50>)(4)
  mapc(#f(compiled-function (id) #<bytecode 0x18d1a58f937e8e50>) (4))
  seq-do(#f(compiled-function (id) #<bytecode 0x18d1a58f937e8e50>) (4))
  mu4e-view-mime-part-action()
  funcall-interactively(mu4e-view-mime-part-action)
  command-execute(mu4e-view-mime-part-action)

The same thing happens if I run C-u 4 M-x gnus-article-save-part.

Hitting o to open the part with the same number works fine.

Environment

Debian bookworm Emacs 29.3 mu4e 1.12.3

Checklist

• [X] you are running either an 1.8.x/1.10.x release or master (otherwise please upgrade)
• [ ] you can reproduce the problem without 3rd party extensions (including Doom/Evil, various extensions etc.) -- I do run under Doom and it is quite difficult to run mu4e without it; however, I don't see anything Doom-related in this backtrace.
• [X] you have read all of the above

Please make sure you all items in the checklist are set/met before filing the ticket. Thank you!

[djcb]

This has been fixed in master, soon-to-be 1.12.4.

[jgoerzen]

Thanks!

[djcb]

Fixed with 1.12.4.