From 2032fccbb7eb9f300240933921a356a437f80027 Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@iki.fi>
Date: Tue, 3 Oct 2017 21:22:16 +0300
Subject: [PATCH] Fix valgrind warning about uninitialized variable use in
 to_stream()

tm variable is not initialized in to_stream(), and valgrind warns about
"Conditional jump or move depends on uninitialised value(s)".

This is a false positive, as strftime always reads tm_hour, even if it
ends up never using it. To silence the warnings, initialize tm to zero.
---
 include/date/date.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/date/date.h b/include/date/date.h
index 4780aa8..fba24cd 100644
--- a/include/date/date.h
+++ b/include/date/date.h
@@ -4566,7 +4566,7 @@ to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
 {
     using namespace std;
     using namespace std::chrono;
-    tm tm;
+    tm tm{};
 #if !ONLY_C_LOCALE
     auto& facet = use_facet<time_put<CharT>>(os.getloc());
 #endif