--- binutils.orig/bfd/dwarf2.c	2018-07-11 14:28:44.557235916 +0100
+++ binutils-2.29.1/bfd/dwarf2.c	2018-07-11 14:38:37.611875790 +0100
@@ -1593,7 +1593,7 @@ concat_filename (struct line_info_table
 {
   char *filename;
 
-  if (file - 1 >= table->num_files)
+  if (table == NULL || file - 1 >= table->num_files)
     {
       /* FILE == 0 means unknown.  */
       if (file)