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dart / sdk / 9b750f92001e13d3e0aacf72d277fc937f8d8890
commit9b750f92001e13d3e0aacf72d277fc937f8d8890[log] [tgz]
authorNate Biggs <natebiggs@google.com>Thu Nov 20 08:50:50 2025 -0800
committerCommit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com>Thu Nov 20 08:50:50 2025 -0800
treed485234a25bdf4c9999a29fe135f54afa6496f64
parente85392f859d9c4d236004532ffa397da6d7b1606 [diff]
[stable][dart2wasm] Fix nullable int switch handling.

Issue description: A bug in wasm codegen was causing the compiler to crash when compiling switch statements where all the cases are ints except for a null case.

What is the fix: Skip handling the null case around the int handling logic. The null case has already been handled earlier in the codegen.

Why cherry-pick: Some programs using relatively common patterns cause dart2wasm to crash.

Risk: This is a low risk change, the fix is isolated to the switch handling code and is a fairly simple change.

Issue link(s): https://github.com/dart-lang/sdk/issues/62022

Bug: https://github.com/dart-lang/sdk/issues/62022
Change-Id: I8fd886780070cb29f2a36c6374808f153fd6e66d
Cherry-pick: https://dart-review.googlesource.com/c/sdk/+/462940
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/463180
Commit-Queue: Nate Biggs <natebiggs@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
3 files changed
tree: d485234a25bdf4c9999a29fe135f54afa6496f64
  1. .dart_tool/
  2. .github/
  3. benchmarks/
  4. build/
  5. docs/
  6. pkg/
  7. runtime/
  8. samples/
  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. .style.yapf
  21. AUTHORS
  22. BUILD.gn
  23. CHANGELOG.md
  24. codereview.settings
  25. CONTRIBUTING.md
  26. DEPS
  27. LICENSE
  28. OWNERS
  29. PATENT_GRANT
  30. PRESUBMIT.py
  31. pubspec.yaml
  32. README.dart-sdk
  33. README.md
  34. sdk.code-workspace
  35. sdk_args.gni
  36. sdk_packages.yaml
  37. SECURITY.md
  38. WATCHLISTS
README.md

Dart

An approachable, portable, and productive language for high-quality apps on any platform

Dart is:

  • Approachable: Develop with a strongly typed programming language that is consistent, concise, and offers modern language features like null safety and patterns.

  • Portable: Compile to ARM, x64, or RISC-V machine code for mobile, desktop, and backend. Compile to JavaScript or WebAssembly for the web.

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app. Diagnose app issues using DevTools.

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.

See LICENSE and PATENT_GRANT.

Using Dart

Visit dart.dev to learn more about the language, tools, and to find codelabs.

Browse pub.dev for more packages and libraries contributed by the community and the Dart team.

Our API reference documentation is published at api.dart.dev, based on the stable release. (We also publish docs from our beta and dev channels, as well as from the primary development branch).

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents in our repo at docs.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.

Roadmap

Future plans for Dart are included in the combined Dart and Flutter roadmap on the Flutter wiki.