From 9bf5f2188f0379a15db062a3b87b5ec844c600e9 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Mon, 6 Jun 2022 08:25:43 +0900
Subject: [PATCH] internal/atlas: add an assertion at SetIsolated

---
 internal/atlas/image.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/internal/atlas/image.go b/internal/atlas/image.go
index d972b2ac8..acf990b6c 100644
--- a/internal/atlas/image.go
+++ b/internal/atlas/image.go
@@ -712,6 +712,9 @@ func NewImage(width, height int) *Image {
 }
 
 func (i *Image) SetIsolated(isolated bool) {
+	if i.backend != nil {
+		panic("atlas: SetIsolated must be called before its backend is allocated")
+	}
 	i.isolated = isolated
 }