https://bugzilla.redhat.com/show_bug.cgi?id=1507150

diff -up gdb-7.12.1/gdb/dwarf2read.c.orig gdb-7.12.1/gdb/dwarf2read.c

--- gdb-7.12.1/gdb/dwarf2read.c.orig	2017-10-30 20:57:55.729999711 -0200

+++ gdb-7.12.1/gdb/dwarf2read.c	2017-10-30 21:06:31.180999709 -0200

@@ -17306,7 +17306,7 @@ dwarf2_string_attr (struct die_info *die

   if (attr != NULL)

     {

       if (attr->form == DW_FORM_strp || attr->form == DW_FORM_string

-	  || attr->form == DW_FORM_GNU_strp_alt)

+	  || attr->form == DW_FORM_GNU_str_index || attr->form == DW_FORM_GNU_strp_alt)

 	str = DW_STRING (attr);

       else

         complaint (&symfile_complaints,