Module transform cannot export value extracted from default

[kriskowal]

Describe the bug

Endo’s bundler cannot transform an ESM where an exported value was previously obtained from extraction of an object, where the default value was previously extracted. Or rather: this module can’t be bundled:

const { x, y = x } = z;
export { x, y };

Steps to reproduce

1. In packages/module-source run the following failing tests:

test.failing('should support export of defaulted extraction', t => {
  new ModuleSource(`
    const { x, y = x } = globalThis;
    export { x, y };
  `)
});

test.failing('should support export const object with default', t => {
  const _ = new ModuleSource(`
    export const {
      x = undefined,
    } = globalThis;
  `);
  t.pass();
});

Expected behavior

Above test should pass and effect consistent behavior to other spec-compliant implementations.

Platform environment

Additional context

Screenshots