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,