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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');

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-by: Slava Egorov <>
Commit-Queue: Martin Kustermann <>


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A client-optimized language for fast apps on any platform

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