Share the first error messages.

pkg/dart_messages/lib/generated/shared_messages.json

-{"exampleMessage":{"id":"use an Id generated by bin/message_id.dart","category":"AnalysisOptionsError","template":"#use #named #arguments","howToFix":"an explanation on how to fix things"}}
+{"exampleMessage":{"id":"use an Id generated by bin/message_id.dart","subId":0,"category":"AnalysisOptionsError","template":"#use #named #arguments","templateHoleOrder":["arguments","named","use"],"howToFix":"an explanation on how to fix things","options":null,"usedBy":[],"examples":["      Some multiline example;\n      That generates the bug.",{"fileA.dart":"        or a map from file to content.\n        again multiline","fileB.dart":"        with possibly multiple files.\n        muliline too"}]},"CONST_CONSTRUCTOR_OR_FACTORY_WITH_BODY":{"id":"LGJGHW","subId":0,"category":"ParserError","template":"Const constructor or factory cannot have a body.","templateHoleOrder":null,"howToFix":"Remove the 'const' keyword or the body.","options":null,"usedBy":["Platform.dart2js"],"examples":["         class C {\n           const C() {}\n         }\n\n         main() => new C();","         class C {\n           const factory C() {}\n         }\n\n         main() => new C();"]},"CONST_CONSTRUCTOR_WITH_BODY":{"id":"LGJGHW","subId":1,"category":"ParserError","template":"Const constructor cannot have a body.","templateHoleOrder":null,"howToFix":"Remove the 'const' keyword or the body.","options":null,"usedBy":["Platform.analyzer"],"examples":["         class C {\n           const C() {}\n         }\n\n         main() => new C();"]},"CONST_FACTORY":{"id":"LGJGHW","subId":2,"category":"ParserError","template":"Only redirecting factory constructors can be declared to be 'const'","templateHoleOrder":null,"howToFix":"Remove the 'const' keyword or replace the body with '=' followed by a valid target","options":null,"usedBy":["Platform.analyzer"],"examples":["         class C {\n           const factory C() {}\n         }\n\n         main() => new C();"]}}