* eval.c (Fprogn): Check that BODY is a proper list.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/eval.c b/src/eval.c
index 6cb2b7a92b8..e6ccf0bdcb5 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -454,6 +454,12 @@ usage: (progn BODY...)  */)
       body = XCDR (body);
     }
 
+  if (!NILP (body))
+    {
+      /* This can happen if functions like Fcond are the caller.  */
+      wrong_type_argument (Qlistp, body);
+    }
+
   UNGCPRO;
   return val;
 }