emacs-27 821760f 1/2: Don't let a code literal get modified in mml parsing (Bug#39884)

[Noam Postavsky]

branch: emacs-27
commit 821760fdc439214f57212708e23d5c87088d34ee
Author: Noam Postavsky <address@hidden>
Commit: Noam Postavsky <address@hidden>

    Don't let a code literal get modified in mml parsing (Bug#39884)
    
    * lisp/gnus/mml.el (mml-parse-1): Make a fresh cons for the tag type,
    because 'mml-generate-mime' destructively modifies it.
---
 lisp/gnus/mml.el | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/gnus/mml.el b/lisp/gnus/mml.el
index cdd8f3d..556cf08 100644
--- a/lisp/gnus/mml.el
+++ b/lisp/gnus/mml.el
@@ -281,7 +281,7 @@ part.  This is for the internal use, you should never 
modify the value.")
            (setq tag (mml-read-tag)
                  no-markup-p nil
                  warn nil)
-         (setq tag (list 'part '(type . "text/plain"))
+         (setq tag (list 'part (cons 'type "text/plain"))
                no-markup-p t
                warn t))
        (setq raw (cdr (assq 'raw tag))