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The test will cause a crash inside TSAN - most likely due to a overflow
in TSAN's shadow stack (which has a fixed size). These out-of-bound
writes will corrupt memory causing the failures.

The reduction of thist test:

  main() {
    final regexp = RegExp(('a*' * 200) + '\u0100*\\w');
    regexp.firstMatch('a');
  }

will cause a crash when running under TSAN:

  % out/ReleaseTSANX64/dart test.dart
  zsh: segmentation fault  out/ReleaseTSANX64/dart

inside TSAN. It happens in the RegExp frontend which - due to recursive
nature - has very large stack.

TEST=Fixes one false-positive that makes "iso-stress" builder red.

Change-Id: Icabe5b35f8724ef042325e1dfe821d9aba5ea28e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/221460
Reviewed-by: Slava Egorov <vegorov@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
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Dart

A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.

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

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.

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 on our wiki.

Contributing to Dart

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

You can also contribute patches, as described in Contributing.