1 files changed, 62 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fields/private-throwing-initializer.js b/js/src/jit-test/tests/fields/private-throwing-initializer.js
new file mode 100644
index 0000000000..b3e67d6cd6
--- /dev/null
+++ b/js/src/jit-test/tests/fields/private-throwing-initializer.js
@@ -0,0 +1,62 @@
+// Ensure private fields are stamped in order and that
+// we can successfully partially initialize objects.
+
+class Base {
+  constructor(o) {
+    return o;
+  }
+}
+
+let constructorThrow = false;
+
+function maybeThrow() {
+  if (constructorThrow) {
+    throw 'fail'
+  }
+  return 'sometimes'
+}
+
+class A extends Base {
+  constructor(o) {
+    super(o);
+    constructorThrow = !constructorThrow;
+  }
+
+  #x = 'always';
+  #y = maybeThrow();
+
+  static gx(o) {
+    return o.#x;
+  }
+
+  static gy(o) {
+    return o.#y;
+  }
+};
+
+var obj1 = {};
+var obj2 = {};
+
+new A(obj1);
+
+var threw = true;
+try {
+  new A(obj2);
+  threw = false;
+} catch (e) {
+  assertEq(e, 'fail');
+}
+assertEq(threw, true);
+
+A.gx(obj1)
+A.gx(obj2);  // Both objects get x;
+A.gy(obj1);  // obj1 gets y
+
+try {
+  A.gy(obj2);  // shouldn't have x.
+  threw = false;
+} catch (e) {
+  assertEq(e instanceof TypeError, true);
+}
+
+assertEq(threw, true);