2ffdc54d24
- Add a modular test to demonstrate the bug. - Handle `Extension` nodes in `finalizeExports`. Change-Id: Ie16f0c97059d24a122150a607e26fba258d80cfb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/120926 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Nate Bosch <nbosch@google.com>