2 files changed, 47 insertions, 0 deletions
diff --git a/dom/canvas/test/reftest/filters/liveness-document-open.html b/dom/canvas/test/reftest/filters/liveness-document-open.html
new file mode 100644
index 000000000..b3d76e550
--- /dev/null
+++ b/dom/canvas/test/reftest/filters/liveness-document-open.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<title>canvas filters: remove referenced filter element through document.open()</title>
+
+<body onload="loaded()">
+
+<canvas id="canvas" width="10" height="10"></canvas>
+
+<svg height="0">
+  <filter id="filter">
+    <feFlood flood-color="red"/>
+  </filter>
+</svg>
+
+<script>
+
+function loaded() {
+  var ctx = document.getElementById('canvas').getContext('2d');
+
+  ctx.filter = 'url(#filter)';
+  ctx.fillRect(0, 0, 10, 10); // do a draw first to work around bug 1287316
+
+  document.open();
+
+  // The document.open() call removed #filter from the document. So the filter
+  // reference should now be invalid, and the rect should be drawn without a
+  // filter applied, resulting in black.
+  ctx.fillRect(0, 0, 10, 10);
+
+  try {
+    var data = ctx.getImageData(0, 0, 1, 1).data;
+    if (data[0] == 0 && data[1] == 0 && data[2] == 0 && data[3] == 255) {
+      // Successfully painted black.
+      document.write('PASS');
+    } else {
+      // Painted something else, like red.
+      document.write('FAIL');
+    }
+  } catch (e) {
+    document.write('getImageData failed');
+  }
+  document.close();
+}
+
+</script>
diff --git a/dom/canvas/test/reftest/filters/reftest.list b/dom/canvas/test/reftest/filters/reftest.list
index 983030715..f5d671e4d 100644
--- a/dom/canvas/test/reftest/filters/reftest.list
+++ b/dom/canvas/test/reftest/filters/reftest.list
@@ -6,6 +6,7 @@ default-preferences pref(canvas.filters.enabled,true)
 fuzzy-if(azureSkia,1,1500) == global-alpha.html global-alpha-ref.html
 == global-composite-operation.html global-composite-operation-ref.html
 == liveness.html ref.html
+== liveness-document-open.html data:text/html,PASS
 == multiple-drop-shadows.html shadow-ref.html
 == shadow.html shadow-ref.html
 == subregion-fill-paint.html subregion-ref.html