From 509f74a2fb9dbce3d80ea66293e1ac86be5ff6cf Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Wed, 16 Feb 2022 11:35:00 -0800
Subject: [PATCH] libbacktrace: initialize DWARF 5 fields of unit

When I added the fields in 2019-12-13 I forgot to initialize them.

	* dwarf.c (build_address_map): Initialize DWARF 5 fields of unit.
---
 dwarf.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dwarf.c b/dwarf.c
index 362eb60..7561648 100644
--- a/dwarf.c
+++ b/dwarf.c
@@ -2554,6 +2554,9 @@ build_address_map (struct backtrace_state *state, uintptr_t base_address,
       u->comp_dir = NULL;
       u->abs_filename = NULL;
       u->lineoff = 0;
+      u->str_offsets_base = 0;
+      u->addr_base = 0;
+      u->rnglists_base = 0;
 
       /* The actual line number mappings will be read as needed.  */
       u->lines = NULL;