emacs-27 48830c7: Fix a crash in handle_display_spec

[Eli Zaretskii]

branch: emacs-27
commit 48830c73e77255985685bd2df65f031cd115e069
Author: Clément Pit-Claudel <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Fix a crash in handle_display_spec
    
    * src/xdisp.c (handle_display_spec): Check that the cdr of the
    disable-eval spec is a cons before taking its car.  (Bug#41232)
---
 src/xdisp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/xdisp.c b/src/xdisp.c
index b0fbc99..1e86589 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -5104,7 +5104,7 @@ handle_display_spec (struct it *it, Lisp_Object spec, 
Lisp_Object object,
   if (CONSP (spec) && EQ (XCAR (spec), Qdisable_eval))
     {
       enable_eval = false;
-      spec = XCAR (XCDR (spec));
+      spec = CONSP (XCDR (spec)) ? XCAR (XCDR (spec)) : Qnil;
     }
 
   if (CONSP (spec)