Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 40 insertions, 0 deletions

diff --git a/js/src/jit-test/tests/cacheir/bug1536228.js b/js/src/jit-test/tests/cacheir/bug1536228.js
new file mode 100644
index 0000000000..32e17977b8
--- /dev/null
+++ b/js/src/jit-test/tests/cacheir/bug1536228.js
@@ -0,0 +1,40 @@
+load(libdir + "asserts.js");
+
+function test() {
+    var plainDataProperty = {
+        value: 0, enumerable: true, configurable: true, writable: true
+    };
+    var nonEnumerableProperty = {
+        value: 0, enumerable: false, configurable: true, writable: true
+    };
+    var nonConfigurableProperty = {
+        value: 0, enumerable: true, configurable: false, writable: true
+    };
+    var n = 5000;
+    for (var i = 0; i < n; ++i) {
+        var obj = {};
+
+        // Create a different shape for each object to ensure JSOP_INITELEM
+        // below can get into the megamorphic state.
+        Object.defineProperty(obj, "bar" + i, nonEnumerableProperty);
+
+        // Plain data property, will be created through _DefineDataProperty,
+        // which is emitted as JSOP_INITELEM. The object doesn't have a "foo"
+        // property, so JSOP_INITELEM can simply create a new property.
+        Object.defineProperty(obj, "foo", plainDataProperty);
+
+        // Redefine as a non-data property for the last object.
+        var desc = (i + 1 !== n) ? plainDataProperty : nonConfigurableProperty;
+        Object.defineProperty(obj, "foo", desc);
+
+        // Again JSOP_INITELEM, but this time JSOP_INITELEM can't simply add a
+        // property, because "foo" is already present. And for the last object,
+        // which has a non-configurable "foo" property, this call must throw a
+        // TypeError exception.
+        Object.defineProperty(obj, "foo", plainDataProperty);
+    }
+}
+
+for (var i = 0; i < 2; ++i) {
+    assertThrowsInstanceOf(test, TypeError);
+}