Report messages instead of just printing.

pkg/front_end/tool/_fasta/analyzer_compile.dart

Index: pkg/front_end/tool/_fasta/analyzer_compile.dart
diff --git a/pkg/front_end/tool/_fasta/analyzer_compile.dart b/pkg/front_end/tool/_fasta/analyzer_compile.dart
index 18409328c1336dd2d1f4fe694d751cd35ac71f08..bc7b0bb67890e613288f4d5432879ca5b96fd10b 100644
--- a/pkg/front_end/tool/_fasta/analyzer_compile.dart
+++ b/pkg/front_end/tool/_fasta/analyzer_compile.dart
@@ -24,6 +24,8 @@ import 'package:front_end/src/fasta/deprecated_problems.dart'
 
 import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget;
 
+import 'package:front_end/src/fasta/severity.dart' show Severity;
+
 import 'package:front_end/src/fasta/uri_translator.dart' show UriTranslator;
 
 const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);
@@ -40,8 +42,9 @@ Future<Uri> compile(List<String> arguments) async {
       return await task.compile();
     });
   } on deprecated_InputError catch (e) {
+    CompilerContext.current
+        .report(deprecated_InputError.toMessage(e), Severity.error);
     exitCode = 1;
-    print(e.deprecated_format());
     return null;
   }
 }