Address additional editor feedback (from async PR)

Author: rbuckton

spec.html

@@ -22311,7 +22311,8 @@ <h1>
                 1. Else,
                   1. Let _status_ be Completion(InitializeReferencedBinding(_lhsRef_, _nextValue_, ~normal~)).
             1. If _status_ is an abrupt completion, then
-              1. Set _status_ to Completion(DisposeResources(_iterationEnv_.[[DisposeCapability]], _status_)).
+              1. If _iterationEnv_ is not *undefined*, then
+                1. Set _status_ to Completion(DisposeResources(_iterationEnv_.[[DisposeCapability]], _status_)).
               1. Assert: _status_ is an abrupt completion.
               1. Set the running execution context's LexicalEnvironment to _oldEnv_.
               1. If _iteratorKind_ is ~async~, return ? AsyncIteratorClose(_iteratorRecord_, _status_).
@@ -22321,7 +22322,8 @@ <h1>
                 1. Assert: _iterationKind_ is ~iterate~.
                 1. Return ? IteratorClose(_iteratorRecord_, _status_).
             1. Let _result_ be Completion(Evaluation of _stmt_).
-            1. Set _result_ to Completion(DisposeResources(_iterationEnv_.[[DisposeCapability]], _result_)).
+            1. If _iterationEnv_ is not *undefined*, then
+              1. Set _result_ to Completion(DisposeResources(_iterationEnv_.[[DisposeCapability]], _result_)).
             1. Set the running execution context's LexicalEnvironment to _oldEnv_.
             1. If LoopContinues(_result_, _labelSet_) is *false*, then
               1. If _iterationKind_ is ~enumerate~, then
@@ -31241,8 +31243,8 @@ <h1>SuppressedError ( _error_, _suppressed_, _message_ [ , _options_ ] )</h1>
             1. If NewTarget is *undefined*, let _newTarget_ be the active function object; else let _newTarget_ be NewTarget.
             1. Let _O_ be ? OrdinaryCreateFromConstructor(_newTarget_, *"%SuppressedError.prototype%"*, « [[ErrorData]] »).
             1. If _message_ is not *undefined*, then
-              1. Let _msg_ be ? ToString(_message_).
-              1. Perform CreateNonEnumerableDataPropertyOrThrow(_O_, *"message"*, _msg_).
+              1. Let _messageString_ be ? ToString(_message_).
+              1. Perform CreateNonEnumerableDataPropertyOrThrow(_O_, *"message"*, _messageString_).
             1. Perform ? InstallErrorCause(_O_, _options_).
             1. Perform CreateNonEnumerableDataPropertyOrThrow(_O_, *"error"*, _error_).
             1. Perform CreateNonEnumerableDataPropertyOrThrow(_O_, *"suppressed"*, _suppressed_).