Fix NPEs when processing unknown kinds in LSP

Fixes https://github.com/dart-lang/sdk/issues/37016.

Change-Id: I72eae50a03bb2c73678b65a07e6924a2a53d137e
Bug: https://github.com/dart-lang/sdk/issues/37016
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/103131
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Danny Tuppeny <dantup@google.com>
3 files changed
tree: 3a6c19b91b5d12e203f910a3b2a14b724cfda0f0
  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. .gitconfig
  17. .gitignore
  18. .gn
  19. .mailmap
  20. .packages
  21. .vpython
  22. AUTHORS
  23. BUILD.gn
  24. CHANGELOG.md
  25. codereview.settings
  26. CONTRIBUTING.md
  27. DEPS
  28. LICENSE
  29. PATENTS
  30. PRESUBMIT.py
  31. README.dart-sdk
  32. README.md
  33. WATCHLISTS
README.md

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