🔗 Linked issue

Closes #541

📝 Description

The process polyfill uses a Proxy to layer unenv's polyfill over the original process object. When a property doesn't exist on the proxy target, it falls back to processModule (unenv's polyfill implementation):

return Reflect.get(processModule, prop, receiver);

The problem: receiver is the Proxy wrapping the original process, not processModule. When processModule has getters that rely on private fields (like #stdout in the std implementations), Reflect.get invokes the getter with this = receiver — which is the wrong object and lacks the private fields.

This causes:

Uncaught TypeError: Cannot read private member #t from an object whose class did not declare it.

Fix

Pass processModule as the receiver instead of receiver:

- return Reflect.get(processModule, prop, receiver);
+ return Reflect.get(processModule, prop, processModule);

This ensures getters/methods on processModule are invoked with this = processModule, which has the expected private fields.

Credit

Solution identified by the issue reporter @unjs/unenv#541.

Summary by CodeRabbit

• Bug Fixes
  • Corrected the property access behavior in the process polyfill to ensure proper context binding when accessing properties.