From 4bee8c48dfb1c53669dcc94dbe0e13e13af298ac Mon Sep 17 00:00:00 2001
From: Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com>
Date: Mon, 9 Oct 2017 17:37:40 +0200
Subject: [PATCH] cygwin: initialize variable for stack unwinding

The third argument of RtlLookupFunctionEntry actually is documented as
_Inout_opt_ for both x64 and ARM, although generic doc says _Out_ only.

* exceptions.cc (__unwind_single_frame): Initialize hist variable.
---
 winsup/cygwin/exceptions.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/winsup/cygwin/exceptions.cc b/winsup/cygwin/exceptions.cc
index 743c73200..a3ee5cf71 100644
--- a/winsup/cygwin/exceptions.cc
+++ b/winsup/cygwin/exceptions.cc
@@ -280,7 +280,7 @@ __unwind_single_frame (PCONTEXT ctx)
 {
   PRUNTIME_FUNCTION f;
   ULONG64 imagebase;
-  UNWIND_HISTORY_TABLE hist;
+  UNWIND_HISTORY_TABLE hist = {0};
   DWORD64 establisher;
   PVOID hdl;