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- a malformed type used in a is, as, or catch type test results in a dynamic type error being thrown. - a malformed type is not mapped to dynamic anymore. For now, this applies to type tests in checked mode as well, but discussion is still on-going. R=hausner@google.com Review URL: https://codereview.chromium.org//53583003 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@29608 260f80e4-7a28-3924-810f-c04153c831b5