1 files changed, 65 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/asm.js/testBug999790.js b/js/src/jit-test/tests/asm.js/testBug999790.js
new file mode 100644
index 0000000000..85f92c22f7
--- /dev/null
+++ b/js/src/jit-test/tests/asm.js/testBug999790.js
@@ -0,0 +1,65 @@
+function CanBeConstructed(f) {
+    var caught = false;
+    try {
+        new f;
+    } catch (e) {
+        caught = true;
+    }
+    return !caught;
+}
+
+function IsConstructedFunction(f) {
+    return f.hasOwnProperty('length')
+        && f.hasOwnProperty('name')
+        && f.hasOwnProperty('prototype')
+        && f.prototype.hasOwnProperty('constructor')
+        && f.prototype.constructor === f;
+}
+
+function IsntConstructedFunction(f) {
+    return !f.hasOwnProperty('length')
+        && !f.hasOwnProperty('name')
+        && !f.hasOwnProperty('prototype')
+}
+
+var m = function() {
+    "use asm"
+    function g(){}
+    return g;
+};
+assertEq(CanBeConstructed(m), true, "asm.js modules can't be constructed");
+
+var objM = new m;
+assertEq(IsConstructedFunction(objM), true);
+
+var g = m();
+assertEq(CanBeConstructed(g), true, "asm.js functions can't be constructed");
+// g is a ctor returning an primitive value, thus an empty object
+assertEq(Object.getOwnPropertyNames(new g).length, 0);
+
+var n = function() {
+    "use asm"
+    function g(){return 42.0}
+    function h(){return 42}
+    return {
+        g: g,
+        h: h
+    };
+};
+assertEq(CanBeConstructed(n), true, "asm.js modules can't be constructed");
+
+var objN = new n;
+// objN is an object with attributes g and h
+assertEq(IsntConstructedFunction(objN), true);
+assertEq(objN.hasOwnProperty('g'), true);
+assertEq(objN.hasOwnProperty('h'), true);
+
+assertEq(IsConstructedFunction(objN.g), true);
+assertEq(IsConstructedFunction(objN.h), true);
+
+var h = n().h;
+assertEq(CanBeConstructed(h), true, "asm.js functions can't be constructed");
+// h is a ctor returning an primitive value, thus an empty object
+assertEq(Object.getOwnPropertyNames(new h).length, 0);
+
+assertEq(typeof(function() {"use asm"; return {}}.prototype) !== 'undefined', true);