(Fbuffer_swap_text): Signal error if swapping a dead buffer.

diff --git a/src/buffer.c b/src/buffer.c
index 8041e3a..50db471 100644 (file)
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2192,6 +2192,9 @@ DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
   CHECK_BUFFER (buffer);
   other_buffer = XBUFFER (buffer);
 
+  if (NILP (other_buffer->name))
+    error ("Cannot swap a dead buffer's text");    
+
   /* Actually, it probably works just fine.
    * if (other_buffer == current_buffer)
    *   error ("Cannot swap a buffer's text with itself"); */