Bug 1650990 - Add the provided test case as a crashtest. r=kats

Differential Revision: https://phabricator.services.mozilla.com/D84157
2020-07-20 13:03:41 +00:00 · 2020-07-20 13:03:41 +00:00 · 54146b4c3e
--- a/gfx/tests/crashtests/1650990.html
+++ b/gfx/tests/crashtests/1650990.html
@ -0,0 +1,18 @@
+<html><head>
+<meta http-equiv="content-type" content="text/html; charset=windows-1252"><style>
+#a {
+  -webkit-mask: url(data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=);
+  clip: rect(8px, 68px, 1px, 1px);
+}
+* {
+  position: fixed;
+}
+</style>
+<script>
+window.onload = () => {
+  a.show()
+}
+</script>
+</head><body><dialog id="a" open="">
+<font>x</font>
+</dialog></body></html>
--- a/gfx/tests/crashtests/crashtests.list
+++ b/gfx/tests/crashtests/crashtests.list
@ -194,3 +194,4 @@ load 1640401-1.html
 load 1647862.html
 load 1647940.html
 load 1650989-very-large-mask.html
+load 1650990.html