From d14b268b9d0f37811c47cc6b1ebf2433fbb0ad0e Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Sat, 4 Feb 2017 01:18:10 +0300
Subject: [PATCH] libbacktrace: Fix uninitialized variable

---
 src/libbacktrace/pecoff.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/libbacktrace/pecoff.c b/src/libbacktrace/pecoff.c
index 04e0bafb14981..2d6a9877219dc 100644
--- a/src/libbacktrace/pecoff.c
+++ b/src/libbacktrace/pecoff.c
@@ -607,7 +607,9 @@ coff_add (struct backtrace_state *state, int descriptor,
   //       against the upstream libbacktrace, that's what's going on.
   uint32_t str_size;
   off_t str_off;
-  struct backtrace_view syms_view;
+  // NOTE: upstream doesn't have `{0}`, this is a fix for Rust issue #39468.
+  //       If syms_view is not initialized, then `free(syms_view.base)` may segfault later.
+  struct backtrace_view syms_view = {0};
   off_t syms_off;
   size_t syms_size;
   int syms_view_valid;