Improve error messages.

pkg/analyzer/test/generated/parser_fasta_test.dart

Index: pkg/analyzer/test/generated/parser_fasta_test.dart
diff --git a/pkg/analyzer/test/generated/parser_fasta_test.dart b/pkg/analyzer/test/generated/parser_fasta_test.dart
index b73cdcc7ffb0c1b5a495aae88ab0e7800ada7d89..876db5cc481eb56465de2239907cd425ca635029 100644
--- a/pkg/analyzer/test/generated/parser_fasta_test.dart
+++ b/pkg/analyzer/test/generated/parser_fasta_test.dart
@@ -723,6 +723,30 @@ class FormalParameterParserTest_Fasta extends FastaParserTestCase
     super
         .test_parseNormalFormalParameter_function_void_typeParameters_nullable();
   }
+
+  @override
+  @failingTest
+  void test_parseNormalFormalParameter_field_const_noType() {
+    super.test_parseNormalFormalParameter_field_const_noType();
+  }
+
+  @override
+  @failingTest
+  void test_parseNormalFormalParameter_field_const_type() {
+    super.test_parseNormalFormalParameter_field_const_type();
+  }
+
+  @override
+  @failingTest
+  void test_parseNormalFormalParameter_simple_const_noType() {
+    super.test_parseNormalFormalParameter_simple_const_noType();
+  }
+
+  @override
+  @failingTest
+  void test_parseNormalFormalParameter_simple_const_type() {
+    super.test_parseNormalFormalParameter_simple_const_type();
+  }
 }
 
 /**
@@ -747,6 +771,12 @@ class KernelLibraryBuilderProxy implements KernelLibraryBuilder {
   Uri get fileUri => uri;
 
   noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+
+  @override
+  void addCompileTimeError(int charOffset, Object message,
+      {Uri fileUri, bool silent: false}) {
+    fail('$message');
+  }
 }
 
 /**
@@ -960,4 +990,16 @@ class TopLevelParserTest_Fasta extends FastaParserTestCase
     // Fasta.
     super.test_parsePartOfDirective_uri();
   }
+
+  @override
+  @failingTest
+  void test_parseCompilationUnit_operatorAsPrefix_parameterized() {
+    super.test_parseCompilationUnit_operatorAsPrefix_parameterized();
+  }
+
+  @override
+  @failingTest
+  void test_parseCompilationUnit_abstractAsPrefix_parameterized() {
+    super.test_parseCompilationUnit_abstractAsPrefix_parameterized();
+  }
 }