From ca7b59876aa40cb74187877843af658d6771d91c Mon Sep 17 00:00:00 2001
From: Jinny You <jinny@lottiefiles.com>
Date: Wed, 27 Mar 2024 22:10:18 +0900
Subject: [PATCH] lottie: Fix crash from invalid masking method

This change is better for stability. Returns `None` if the `mode` attribute cannot be parsed.

related issue: #2072
---
 src/loaders/lottie/tvgLottieParser.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/loaders/lottie/tvgLottieParser.cpp b/src/loaders/lottie/tvgLottieParser.cpp
index c9bdda6c..6189a9b5 100644
--- a/src/loaders/lottie/tvgLottieParser.cpp
+++ b/src/loaders/lottie/tvgLottieParser.cpp
@@ -42,7 +42,10 @@ static char* _int2str(int num)
 
 CompositeMethod LottieParser::getMaskMethod(bool inversed)
 {
-    switch (getString()[0]) {
+    auto mode = getString();
+    if (!mode) return CompositeMethod::None;
+
+    switch (mode[0]) {
         case 'a': {
             if (inversed) return CompositeMethod::InvAlphaMask;
             else return CompositeMethod::AddMask;