1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug816786.js b/js/src/jit-test/tests/ion/bug816786.js
new file mode 100644
index 000000000..dde740963
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug816786.js
@@ -0,0 +1,38 @@
+var g;
+function test(a, b) {
+
+    g = 0;
+    for(var i=0; i<100; i++) {
+        g += i
+    }
+
+    var t = a*b;
+
+    for(var i=0; i<100; i++) {
+        t = x.y + t;
+        return t;
+    }
+
+}
+
+function negzero(x) {
+  return x===0 && (1/x)===-Infinity;
+}
+
+
+var x = {y:0};
+var a = 0;
+var b = 0;
+for(var i=0; i<58; i++) {
+    var o = test(a, b);
+
+    // Test returns
+    // * 0, if i < 50
+    // * -0, if i >= 50
+    assertEq(negzero(o), i>50);
+
+    if (i == 50) {
+        a = -1
+        x.y = -0
+    }
+}