node:vm microtaskMode: 'afterEvaluate' doesn't seem to be respected #20145
Description
What version of Bun is running?
1.2.15+df017990a
What platform is your computer?
Darwin 24.1.0 arm64 arm
What steps can reproduce the bug?
Run the following code:
import vm from 'vm';
const context = vm.createContext({
console,
}, {
microtaskMode: 'afterEvaluate',
});
const code = `
Promise.resolve().then(() => {
console.log('Microtask inside VM');
});
console.log('End of VM code');
`;
console.log('Before vm.runInContext');
Promise.resolve().then(() => {
console.log('Microtask outside VM');
});
vm.runInContext(code, context);
console.log('After vm.runInContext');What is the expected behavior?
In node environment:
$ npx tsx index.ts
Before vm.runInContext
End of VM code
Microtask inside VM
After vm.runInContext
Microtask outside VM
What do you see instead?
$ bun run index.ts
Before vm.runInContext
End of VM code
After vm.runInContext
Microtask outside VM
Microtask inside VM
Additional information
Currently it does seem like Bun doesn't respect the option. When I remove the option, then the output is the same for both environments