From 1bcbac71ab1734204aae3fe332a2774943da6d71 Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Mon, 11 Sep 2023 21:55:36 +0900
Subject: [PATCH] loader/lottie: fix a invalid matte source access.

parser ignored a matte source has no target.
this fixes the corner case.
---
 src/loaders/lottie/tvgLottieParser.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/loaders/lottie/tvgLottieParser.cpp b/src/loaders/lottie/tvgLottieParser.cpp
index ef62adf6..2bc6f723 100644
--- a/src/loaders/lottie/tvgLottieParser.cpp
+++ b/src/loaders/lottie/tvgLottieParser.cpp
@@ -1074,8 +1074,13 @@ LottieLayer* LottieParser::parseLayers()
                 root->children.push(layer);
             } else {
                 //matte source must be located in the right previous.
-                layer->matte.target = static_cast<LottieLayer*>(root->children.last());
-                layer->statical &= layer->matte.target->statical;
+                auto matte = static_cast<LottieLayer*>(root->children.last());
+                if (matte->matteSrc) {
+                    layer->matte.target = matte;
+                    layer->statical &= layer->matte.target->statical;
+                } else {
+                    TVGLOG("LOTTIE", "Matte Source(%s) is not designated?", matte->name);
+                }
                 root->children.last() = layer;
             }
             root->statical &= layer->statical;