1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/warp/bug1688346.js b/js/src/jit-test/tests/warp/bug1688346.js
new file mode 100644
index 0000000000..0e3bbcdd05
--- /dev/null
+++ b/js/src/jit-test/tests/warp/bug1688346.js
@@ -0,0 +1,12 @@
+function f(x) {
+    let y = Math.trunc(x);
+    return y - y;
+}
+
+with ({}) {}
+
+for (var i = 0; i < 50; i++) {
+    f(0.1);
+}
+
+assertEq(f(NaN), NaN);