5daa5646ef8e09739778720aa27a89a26bd70aeb
Narrowing of ranges should only occur if the new range is actually narrower than the old range. It can happen that a symbolic range is worse than the already computed one. Ignore the new range in this case. BUG=dartbug.com/23693 R=vegorov@google.com Review URL: https://codereview.chromium.org//1219623004.
Dart
Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.
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