[mu4e bug] headers scrolled off the top of the window when viewing message in mu4e:view

[jaknel]

Describe the bug

The buffer is scrolled within the window such that the first few headers are not visible when first selecting a message to read. Expected behavior is that all headers are visible on first opening an email. M-x gnus-article-hide-headers reformats the buffer headers as I would expect, but does delete the Mu4e added Flags and Maildir headers. I think the issue is in this function and possibly at this line:

mu/mu4e/mu4e-view.el

Line 803 in 9316d89

(let ((gnus-treatment-function-alist

where gnus-treatment-function-alist gets redefined but I haven't figured out a solution.

Example

When opening a sample email these are the three headers visible:

Date: Fri, 5 Apr 2024 09:55:53 -0400 (43 minutes, 45 seconds ago)
Flags: seen, personal
Maildir:

However when scrolling to the top of the email the message has these headers:
From:
Subject:
To:
CC:
Date: Fri, 5 Apr 2024 09:55:53 -0400 (43 minutes, 45 seconds ago)
Flags: seen, personal
Maildir:

How to Reproduce

1. started emacs -Q
2. (add-to-list 'load-path "/usr/local/share/emacs/site-lisp/mu4e")
3. M-x load-library RET mu4e RET
4. M-x mu4e
5. select an email to read
6. Scroll up to see all headers.

Environment
Ubuntu Linux

mu master 9316d89 (4/5/2024)
emacs master ce29ae32d0b05cedbc9ba65c1a347ab7c34420ad (3/18/2024)

[djcb]

Hmmm, that code snippet is years old; OTOH earlier this week people mentioned suddenly seeing this behavior. I can't reproduce with my normal daily-driver emacs, but I can with the steps-to-reproduce... I'll but a fix in place. Thanks!

[jaknel]

Thanks. Tested the patch and works for me.