Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using? If you use the CDN bundles, please specify the exact bundle (e.g. bundle.tracing.min.js) in your SDK setup.

@sentry/react

SDK Version

7.47.0

Framework Version

17.0.2

Link to Sentry event

No response

SDK Setup

Sentry.init({
  dsn: '<DSN>',
  debug: true,
  release: 'local-test',
  environment: 'local-test',
  integrations: [new HttpClientIntegration()],
});

Steps to Reproduce

I've prepared an example repository that demonstrates this issue: https://github.com/eipc16/sentry-request-object-bug-example. So you can just:

• git clone git@github.com:eipc16/sentry-request-object-bug-example.git .
• npm install
• npm run dev
• Click on the Fetch with Request Object button

If you do not want to clone this repo then:

• create a project with '@sentry/react and '@sentry/integrations
• configure HttpClient integration from @sentry/integrations
• execute a fetch request by sending to it a whole Request object (it has to have a body). Example:

fetch( new Request('/api/error', { method: 'post', body: JSON.stringify({ property: 'value' }) }) )

Expected Result

Instrumentation should work and 5XX should result in an event to Sentry

Actual Result