`result.error` is undefined but server returned 429 response

[pesterhazy]

openapi-typescript version

0.14.0

Node.js version

v22.20.0

OS + version

macOS 15.5

Description

I had to apply this patch to get proper error handling:

-    const { data, error } = await this.client.POST(`/invitees`, {
+    const { data, error, response } = await this.client.POST(`/invitees`, {
       body,
     });
     if (error) {
       throw new ExInfo(`Error: ${error.message}`, {
         data: { details: error.details },
         cause: error,
       });
     }
+    if (!response.ok) {
+      throw new ExInfo(`Error: ${response.statusText}`, {
+        data: { details: response.statusText },
+        cause: response.statusText,
+      });
+    }

The reason is that error is sometimes undefined even though the server returned 4xx - specifically if the 4xx response is not mentioned in the openapi schema.

This happens with 429 Rate Limited errors which get added by Cloudflare (but not to the api spec).

Reproduction

Server response doesn't mention 429 error. Server returns 429 with no response body

Expected result

either

• error is set to some value
• the docs state that you need to ALSO check response.ok

Required

• My OpenAPI schema is valid and passes the Redocly validator (npx @redocly/cli@latest lint)

Extra

• I’m willing to open a PR (see CONTRIBUTING.md)

[pesterhazy]

Related

#2530

#2461

#2372