From d9abcee47eb5540f6f5fd60b83cc7d45ad7bc56f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?K=C3=A9vin=20Dietrich?= <kevin.dietrich@mailoo.org>
Date: Tue, 23 Feb 2021 01:57:03 +0100
Subject: Alembic procedural: fix crash when accessing data out of frame bounds

---
 intern/cycles/render/alembic.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/intern/cycles/render/alembic.cpp b/intern/cycles/render/alembic.cpp
index 5942e512e60..0f11a9368da 100644
--- a/intern/cycles/render/alembic.cpp
+++ b/intern/cycles/render/alembic.cpp
@@ -1344,6 +1344,11 @@ void AlembicProcedural::generate(Scene *scene, Progress &progress)
   assert(scene_ == nullptr || scene_ == scene);
   scene_ = scene;
 
+  if (frame < start_frame || frame > end_frame) {
+    clear_modified();
+    return;
+  }
+
   bool need_shader_updates = false;
 
   /* Check for changes in shaders (newly requested attributes). */
-- 
cgit v1.2.3