Vyacheslav Egorov e0d19e2897 Fix frontend_server error reporting. (#4461)
* Do not use CompilerOptions.onError to report errors.

CompilerMessage does not carry correct SourceSpan
which makes errors unreadable: they all point to
line 1 column XYZ.

* Run dartfmt on frontend_server/lib/server.dart.

* Fix linting issues for frontend_server
2017-12-14 16:26:53 +01:00
..