Avoid crashes in string concatenation 32-bit integer overflow test The test standalone/string_overflow_test.dart is causing crashes and out-of-memory thrashing on some configurations. It was originally a regression test that concatenating a string with 2^31 characters did not overflow a 32-bit signed integer. It was changed to exponentially grow a string until an out-of-memory runtime exception is thrown in Dart. On some VM configurations, this crashes the machine instead. Restoring it to only check concatenating a string of 2^31 bytes. Bug: https://github.com/dart-lang/sdk/issues/46225 Change-Id: Ib50625fe14be2613c907a7bc30cd57766693f6aa Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/332423 Reviewed-by: Martin Kustermann <kustermann@google.com>
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