1 files changed, 10 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/ion/bug1143878.js b/js/src/jit-test/tests/ion/bug1143878.js
new file mode 100644
index 0000000000..7860b065ad
--- /dev/null
+++ b/js/src/jit-test/tests/ion/bug1143878.js
@@ -0,0 +1,10 @@
+function f(x, y) {
+    if (!y)
+        assertEq(x == x + x, false)
+}
+m = [true, null]
+for (var j = 0; j < 2; ++j) {
+    for (var k = 0; k < 2; ++k) {
+        f(m[j], m[k])
+    }
+}