fix(middleware-serde): handle unwritable error message

Author: kuhe

.changeset/brave-trees-fry.md

@@ -0,0 +1,5 @@
+---
+"@smithy/middleware-serde": patch
+---
+
+handle unwritable error.message field

packages/middleware-serde/src/deserializerMiddleware.ts

@@ -41,7 +41,12 @@ export const deserializerMiddleware =
       if (!("$metadata" in error)) {
         // only apply this to non-ServiceException.
         const hint = `Deserialization error: to see the raw response, inspect the hidden field {error}.$response on this object.`;
-        error.message += "\n  " + hint;
+        try {
+          error.message += "\n  " + hint;
+        } catch (e) {
+          // Error with an unwritable message (strict mode getter with no setter).
+          console.warn(hint);
+        }
 
         if (typeof error.$responseBodyText !== "undefined") {
           // if $responseBodyText was collected by the error parser, assign it to