Fix a bug in the async transformation of let expressions

The transformation worked as if there was never an await "to the
right" of the body of a let expression (i.e., an expression evaluated
after the let expression's body but before the value of the let
expression's body is used).  This is obviously not right.

Fixes https://github.com/dart-lang/sdk/issues/33206

Change-Id: Idc175dc8c65f3d520de8b65f2285164d361ff38e
Reviewed-on: https://dart-review.googlesource.com/56492
Commit-Queue: Kevin Millikin <kmillikin@google.com>
Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
7 files changed
tree: 2f9e07dbf83aa029391c72ce71095a2ab9ea58d0
  1. .github/
  2. build/
  3. client/
  4. docs/
  5. pkg/
  6. runtime/
  7. samples/
  8. samples-dev/
  9. sdk/
  10. tests/
  11. third_party/
  12. tools/
  13. utils/
  14. .clang-format
  15. .gitattributes
  16. .gitignore
  17. .gn
  18. .mailmap
  19. .packages
  20. AUTHORS
  21. BUILD.gn
  22. CHANGELOG.md
  23. codereview.settings
  24. dartdoc_options.yaml
  25. DEPS
  26. LICENSE
  27. PATENTS
  28. PRESUBMIT.py
  29. README.dart-sdk
  30. README.md
  31. WATCHLISTS
README.md

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