diff -r 000000000000 -r 6474c204b198 js/src/jit-test/tests/jaeger/bug549393-1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jit-test/tests/jaeger/bug549393-1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+// |jit-test| error: TypeError
+function start() {
+  MAX_TOTAL_TIME = startTime = new Date
+  do {
+  if (rnd(0)) return (a[rnd()])()
+    lastTime = new Date
+  } while ( lastTime - startTime < MAX_TOTAL_TIME )
+}
+function MersenneTwister19937() {
+  this.init_genrand = function() {
+    for (mti = 1; mti < 4; mti++) {
+      Array[mti] = 1
+    }
+  };
+  this.genrand_int32_t = function() {
+    if (mti > 4) {
+      mti = 0
+    }
+    return Array[mti++];
+  }
+} (function() {
+  fuzzMT = new MersenneTwister19937;
+  fuzzMT.init_genrand()
+  rnd = function() {
+    return Math.floor(fuzzMT.genrand_int32())
+  }
+} ())
+function weighted(wa) {
+  a = []
+  for (i = 0; i < wa.length; ++i) {
+    for (var j = 0; j < 8; ++j) {
+      a.push(wa[i].fun)
+    }
+  }
+}
+statementMakers = weighted([{
+  fun: function makeMixedTypeArray() { [[, , , , , , , , , , , , , , , , , , ,
+, , , , , ""][(a[rnd()])()]]}
+}])
+start() 
+
+/* Don't assert. */
+