| <!DOCTYPE html> |
| <script> |
| if (window.testRunner) { |
| testRunner.dumpAsText(); |
| testRunner.waitUntilDone(); |
| window.onload = function() { |
| testRunner.layoutAndPaintAsyncThen(function() { |
| mutateTree(); |
| testRunner.layoutAndPaintAsyncThen(function() { |
| testRunner.notifyDone(); |
| }); |
| }); |
| }; |
| } else { |
| window.onload = function() { setTimeout(mutateTree, 100); }; |
| } |
| const svgNs = 'http://www.w3.org/2000/svg'; |
| function buildPattern(patternId, refId) { |
| var pattern = document.createElementNS(svgNs, 'pattern'); |
| var rect = pattern.appendChild(document.createElementNS(svgNs, 'rect')); |
| pattern.setAttribute('id', patternId); |
| pattern.setAttribute('width', 1); |
| pattern.setAttribute('height', 1); |
| rect.setAttribute('width', 100); |
| rect.setAttribute('height', 100); |
| rect.setAttribute('fill', 'url(#' + refId + ')'); |
| return pattern; |
| } |
| function mutateTree() { |
| // Get reference to rect in pattern#p2 before inserting the pattern. |
| var p2rect = document.getElementsByTagName('rect')[1]; |
| |
| // Add a pattern#p3 and a reference to it from pattern#p2 to form a cycle. |
| var defs = document.querySelector('defs'); |
| defs.appendChild(buildPattern('p3', 'p1')); |
| p2rect.setAttribute('fill', 'url(#p3)'); |
| } |
| </script> |
| <p>PASS if no crash (stack overflow).</p> |
| <svg width="100" height="100"> |
| <rect width="100" height="100" fill="url(#p1)"/> |
| <defs> |
| <pattern id="p2" width="1" height="1"> |
| <rect width="100" height="100"/> |
| </pattern> |
| <pattern id="p1" width="1" height="1"> |
| <rect fill="url(#p2)" width="100" height="100"/> |
| </pattern> |
| </defs> |
| </svg> |
