From 594e8718e7feaa5081a59a09d7d3cdc3562ba7c2 Mon Sep 17 00:00:00 2001
From: Jan Kratochvil <jan.kratochvil@redhat.com>
Date: Mon, 22 Nov 2010 20:35:02 +0000
Subject: [PATCH] gdb/ 	* dwarf2read.c (dwarf2_read_index): Ignore higher
 .gdb_index versions.

---
 gdb/ChangeLog    | 4 ++++
 gdb/dwarf2read.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4d5011f8c4..314753b1be 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2010-11-22  Jan Kratochvil  <jan.kratochvil@redhat.com>
+
+	* dwarf2read.c (dwarf2_read_index): Ignore higher .gdb_index versions.
+
 2010-11-22  Tom Tromey  <tromey@redhat.com>
 
 	* Makefile.in (.PRECIOUS): Reference ada-lex.c.
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 7ad8037d4e..f6ee4384f8 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -1941,6 +1941,10 @@ dwarf2_read_index (struct objfile *objfile)
      it seems better to just ignore such indices.  */
   if (version < 3)
     return 0;
+  /* Indexes with higher version than the one supported by GDB may be no
+     longer backward compatible.  */
+  if (version > 3)
+    return 0;
 
   map = OBSTACK_ZALLOC (&objfile->objfile_obstack, struct mapped_index);
   map->total_size = dwarf2_per_objfile->gdb_index.size;