I extracted grep.el from grep.el.gz
I loaded the patch and applied it to grep.el
The hunks applied successfully
I retried my rgrep opperation and got this in messages:
Source file ‘c:/Users/HoechtlJ/AppData/Local/Emacs/share/emacs/31.0.50/lisp/progmodes/grep.el’ newer than byte-compiled file; using older file
Making completion list...
compilation-start: Symbol’s value as variable is void: grep-compilation-transform-finished-rules [2 times]
So I renamed grep.el.gz to grep.elgz.o and grep.elc to grep.elc.o
Still no luck but the compilation error remains
compilation-start: Symbol’s value as variable is void: grep-compilation-transform-finished-rules
A new native byte compiled version of grep.el was created though.
Is the compilation error actually misleading? It seems as if I get the error
Source file
‘c:/Users/HoechtlJ/AppData/Local/Emacs/share/emacs/31.0.50/lisp/progmodes/grep.el’
newer than byte-compiled file; using older file
Making completion list...
compilation-start: Symbol’s value as variable is void: grep-compilation-transform-finished-rule
using older file would indicate that it is using grep.elc but it seems Emacs does in fact use the NEW pathed grep.el