Bug 1771007 - Add testcase. r=aosmond

Differential Revision: https://phabricator.services.mozilla.com/D153308
2022-07-31 15:36:59 +00:00 · 2022-07-31 15:36:59 +00:00 · 57b5364468
--- a/dom/canvas/crashtests/1771007-1.html
+++ b/dom/canvas/crashtests/1771007-1.html
@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <script id="worker1" type="javascript/worker">
+      self.onmessage = async function (e) {
+        const canvas = new OffscreenCanvas(82, 127)
+        canvas.getContext('2d', {})
+        canvas.width = 134
+        await canvas.convertToBlob({})
+        canvas.transferToImageBitmap()
+      }
+    </script>
+    <script>
+      window.addEventListener('load', () => {
+        const blob = new Blob([document.querySelector('#worker1').textContent], { type: 'text/javascript' })
+        const worker = new Worker(window.URL.createObjectURL(blob))
+        worker.postMessage([], [])
+        setTimeout('self.close()', 500)
+      })
+    </script>
+</head>
+</html>
--- a/dom/canvas/crashtests/crashtests.list
+++ b/dom/canvas/crashtests/crashtests.list
@ -63,3 +63,4 @@ pref(webgl.enable-privileged-extensions,true) load 1744172.html
 load 1757925-1.html
 load 1757755.html
 pref(gfx.offscreencanvas.enabled,true) load 1769878.html
+pref(gfx.offscreencanvas.enabled,true) load 1771007-1.html