diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/auto-regress/bug779390.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/auto-regress/bug779390.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+// Binary: cache/js-dbg-64-b46621aba6fd-linux
+// Flags: --ion-eager
+//
+
+function TestCase(n, d, e, a) {
+  this.passed = getTestCaseResult(e, a);
+}
+function getTestCaseResult(expected, actual) {}
+try {
+for (var i = 0; i < bomchars.length; i++)
+  try {} catch(ex) {}
+} catch(exc0) {}
+["a"].map(function(s) {gczeal(4);})[0]
+new TestCase();
+new TestCase("", "", 5e-324, i);