| <!DOCTYPE html> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| Passes if it does not crash. |
| <script> |
| async_test(t => { |
| if (window.internals) { |
| var canvas = document.createElement('canvas'); |
| canvas.width = canvas.height = 300; |
| var ctx = canvas.getContext('2d'); |
| document.body.appendChild(ctx.canvas); |
| |
| var offscreen = new OffscreenCanvas(300,300); |
| var ctx = offscreen.getContext('2d'); |
| var img = offscreen.transferToImageBitmap(); |
| internals.forceLoseCanvasContext(ctx); |
| ctx.createPattern(img, "repeat-y"); |
| } |
| t.done(); |
| }); |
| </script> |
