1 files changed, 48 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fields/private-proxy-oom.js b/js/src/jit-test/tests/fields/private-proxy-oom.js
new file mode 100644
index 0000000000..75e63b7864
--- /dev/null
+++ b/js/src/jit-test/tests/fields/private-proxy-oom.js
@@ -0,0 +1,48 @@
+// |jit-test| skip-if: !('oomTest' in this); --enable-private-fields
+// Check for proxy expando OOM issues.
+
+function assertThrowsTypeError(f) {
+  assertThrowsInstanceOf(f, TypeError);
+}
+
+
+function testing() {
+  var target = {};
+  var p1 = new Proxy(target, {});
+  var p2 = new Proxy(target, {});
+
+  class A extends class {
+    constructor(o) {
+      return o;
+    }
+  }
+  {
+    #field = 10;
+    static gf(o) {
+      return o.#field;
+    }
+    static sf(o) {
+      o.#field = 15;
+    }
+  }
+
+  // Verify field handling on the proxy we install it on.
+  new A(p1);
+  assertEq(A.gf(p1), 10);
+  A.sf(p1)
+  assertEq(A.gf(p1), 15);
+
+  // Should't be on the target
+  assertThrowsTypeError(() => A.gf(target));
+
+  // Can't set the field, doesn't exist
+  assertThrowsTypeError(() => A.sf(p2));
+
+  // Definitely can't get the field, doesn't exist.
+  assertThrowsTypeError(() => A.gf(p2));
+
+  // Still should't be on the target.
+  assertThrowsTypeError(() => A.gf(target));
+}
+
+oomTest(testing);
+\ No newline at end of file