From c15103e03352aae5c67fc359ce59f3b5e0834921 Mon Sep 17 00:00:00 2001
From: JunsuChoi <jsuya.choi@samsung.com>
Date: Wed, 2 Sep 2020 17:10:50 +0900
Subject: [PATCH] SvgLoader: Prevent underflow when stack.cnt is 0

If graphic node is directly located in the <svg>(root) node,
it may cause underflow because stack.cnt is 0.
---
 src/loaders/svg/tvgSvgLoader.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/loaders/svg/tvgSvgLoader.cpp b/src/loaders/svg/tvgSvgLoader.cpp
index d6334f52..093fe472 100644
--- a/src/loaders/svg/tvgSvgLoader.cpp
+++ b/src/loaders/svg/tvgSvgLoader.cpp
@@ -1963,7 +1963,8 @@ static void _svgLoaderParserXmlOpen(SvgLoaderData* loader, const char* content,
             loader->stack.push(node);
         }
     } else if ((method = _findGraphicsFactory(tagName))) {
-        parent = loader->stack.list[loader->stack.cnt - 1];
+        if (loader->stack.cnt > 0) parent = loader->stack.list[loader->stack.cnt - 1];
+        else parent = loader->doc;
         node = method(loader, parent, attrs, attrsLength);
     } else if ((gradientMethod = _findGradientFactory(tagName))) {
         SvgStyleGradient* gradient;