diff --git a/mozilla/layout/generic/crashtests/414061-1.html b/mozilla/layout/generic/crashtests/414061-1.html
new file mode 100644
index 00000000000..87e471262a9
--- /dev/null
+++ b/mozilla/layout/generic/crashtests/414061-1.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+<head>
+</head>
+<body style="width: 1px; white-space: pre; -moz-column-width: 1px;">
+
+x
+
+<div style="margin: -200em;"></div>
+
+</body>
+</html>
diff --git a/mozilla/layout/generic/crashtests/418532-1.html b/mozilla/layout/generic/crashtests/418532-1.html
new file mode 100644
index 00000000000..da137a4dcb5
--- /dev/null
+++ b/mozilla/layout/generic/crashtests/418532-1.html
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style type="text/css">
+div:first-line { font-size: 80%; color: green; }
+</style>
+</head>
+<body style="-moz-column-width: 1px"><div id="div" style="-moz-column-width: 1px"> <span>Foo bar</span></div></body>
+</html>
diff --git a/mozilla/layout/generic/crashtests/crashtests.list b/mozilla/layout/generic/crashtests/crashtests.list
index 8bbe918a41c..81cf49294e2 100644
--- a/mozilla/layout/generic/crashtests/crashtests.list
+++ b/mozilla/layout/generic/crashtests/crashtests.list
@@ -132,5 +132,6 @@ load 414719-1.html
 load 415685-1.html
 load 416264-1.html
 load 416476-1.html
+load 418532-1.html
 load 421404-1.html
 load 425253-1.html
