diff --git a/bfd/dwarf2.c b/bfd/dwarf2.c
 index ca22db7..0f8257f 100644
 --- a/bfd/dwarf2.c
 +++ b/bfd/dwarf2.c
 @@ -1566,7 +1566,7 @@ concat_filename (struct line_info_table *table, unsigned int file)
  {
    char *filename;
  
 -  if (file - 1 >= table->num_files)
 +  if (table == NULL || file - 1 >= table->num_files)
      {
        /* FILE == 0 means unknown.  */
        if (file)
 -- 
 2.9.3