Blob LastModified incompatibility with Node

[EmilyNyx]

What version of Bun is running?

Bun v1.1.30-canary.71+af82a446d (macOS arm64)

What platform is your computer?

Darwin 24.0.0 arm64 arm

What steps can reproduce the bug?

class MyBlob extends Blob {
  constructor(parts) {
    super(parts);
    this.lastModified = 123;
  }
}

const blob = new MyBlob(["foo"]);

What is the expected behavior?

In node, works fine.

What do you see instead?

bun test.js

1 | class MyBlob extends Blob {
2 |   constructor(parts) {
3 |     super(parts);
4 |     this.lastModified = 123;
        ^
TypeError: Attempted to assign to readonly property.
      at new MyBlob (/Users/emily/Sites/ut-test/up-test.js:4:5)
      at /Users/emily/Sites/ut-test/up-test.js:8:14

Additional information

No response

[nektro]

cause of error is here https://github.com/oven-sh/bun/blob/73537de184ed1f34/src/bun.js/webcore/response.classes.ts#L161