Index: symfile.c
===================================================================
RCS file: /cvs/src/src/gdb/symfile.c,v
retrieving revision 1.166
diff -u -p -r1.166 symfile.c
--- symfile.c	1 Feb 2006 23:14:10 -0000	1.166
+++ symfile.c	2 Feb 2006 18:21:11 -0000
@@ -1876,6 +1876,13 @@ add_symbol_file_command (char *args, int
       argcnt++;
     }
 
+  /* This command takes at least two arguments.  The first one is a
+     filename, and the second is the address where this file has been
+     loaded.  Abort now if this address hasn't been provided by the
+     user.  */
+  if (section_index < 1)
+    error (_("The address where %s has been loaded is missing"), filename);
+
   /* Print the prompt for the query below. And save the arguments into
      a sect_addr_info structure to be passed around to other
      functions.  We have to split this up into separate print