1 files changed, 40 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js b/js/src/tests/test262/language/statements/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js
new file mode 100644
index 0000000000..014716a774
--- /dev/null
+++ b/js/src/tests/test262/language/statements/class/elements/syntax/early-errors/grammar-private-environment-on-class-heritage-obj-literal.js
@@ -0,0 +1,40 @@
+// |reftest| error:SyntaxError
+// This file was procedurally generated from the following sources:
+// - src/class-elements/grammar-private-environment-on-class-heritage-obj-literal.case
+// - src/class-elements/syntax/invalid/cls-decl-elements-invalid-syntax.template
+/*---
+description: It's a SyntaxError if a object literal evaluated on ClassHeritage uses a private name. (class declaration)
+esid: prod-ClassElement
+features: [class-fields-private, class-fields-public, class]
+flags: [generated]
+negative:
+  phase: parse
+  type: SyntaxError
+info: |
+    Runtime Semantics: ClassDefinitionEvaluation
+
+    ClassTail : ClassHeritage { ClassBody }
+        ...
+        5. Let outerPrivateEnvironment be the PrivateEnvironment of the running execution context.
+        6. Let classPrivateEnvironment be NewDeclarativeEnvironment(outerPrivateEnvironment).
+        7. Let classPrivateEnvRec be classPrivateEnvironment's EnvironmentRecord.
+        8. If ClassBodyopt is present, then
+            a. For each element dn of the PrivateBoundIdentifiers of ClassBodyopt,
+              i. Perform classPrivateEnvRec.CreateImmutableBinding(dn, true).
+        9. If ClassHeritageopt is not present, then
+            a. Let protoParent be the intrinsic object %ObjectPrototype%.
+            b. Let constructorParent be the intrinsic object %FunctionPrototype%.
+        10. Else,
+            a. Set the running execution context's LexicalEnvironment to classScope.
+            b. NOTE: The running execution context's PrivateEnvironment is outerPrivateEnvironment when evaluating ClassHeritage.
+        ...
+
+---*/
+
+
+$DONOTEVALUATE();
+
+class C extends (o) => {x: o.#foo}
+{
+  #foo;
+}