emacs-30 ae2463796f2: ; Caveats about using :eval in 'mode-line-format'

[Eli Zaretskii]

branch: emacs-30
commit ae2463796f236b8ee2cef3b5e38bffa13abd2233
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    ; Caveats about using :eval in 'mode-line-format'
    
    * doc/lispref/modes.texi (Mode Line Data): Warn against more
    infinite-recursion cases in ':eval' in mode line.  Reported by
    Nicolas P. Rougier <nicolas.rougier@inria.fr>.
---
 doc/lispref/modes.texi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/lispref/modes.texi b/doc/lispref/modes.texi
index 27b74a9d233..b24a89af9e0 100644
--- a/doc/lispref/modes.texi
+++ b/doc/lispref/modes.texi
@@ -2227,8 +2227,9 @@ construct.)
 @item (:eval @var{form})
 A list whose first element is the symbol @code{:eval} says to evaluate
 @var{form}, and use the result as a string to display.  Make sure this
-evaluation cannot load any files, as doing so could cause infinite
-recursion.
+evaluation cannot load any files, nor calls functions like
+@code{posn-at-point} or @code{window-in-direction}, which themselves
+evaluate the mode line, as doing so could cause infinite recursion.
 
 @item (:propertize @var{elt} @var{props}@dots{})
 A list whose first element is the symbol @code{:propertize} says to