(Fset_buffer_major_mode): Check that BUFFER is valid.

2 files changed, 4 insertions, 0 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index e001f27c9bb..f2dda067c62 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,7 @@
 2007-03-29  Juanma Barranquero  <lekktu@gmail.com>
 
+        * buffer.c (Fset_buffer_major_mode): Check that BUFFER is valid.
+
         * process.c (Fformat_network_address): Return nil when the
         argument vector contains invalid values.
 
diff --git a/src/buffer.c b/src/buffer.c
index 20cab85e9da..3ad92331e01 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1614,6 +1614,8 @@ the current buffer's major mode.  */)
   int count;
   Lisp_Object function;
 
+  CHECK_BUFFER (buffer);
+
   if (STRINGP (XBUFFER (buffer)->name)
       && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0)
     function = find_symbol_value (intern ("initial-major-mode"));