Serialize parameters visible ranges.

pkg/analyzer/lib/src/summary/summarize_ast.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library serialization.summarize_ast;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/utilities_dart.dart';
@@ skipping 526 matching lines @@
     }
     b.visibleOffset = enclosingBlock?.offset;
     b.visibleLength = enclosingBlock?.length;
     serializeFunctionBody(b, body);
     scopes.removeLast();
     assert(scopes.length == oldScopesLength);
     return b;
   }
 
   void serializeFunctionBody(UnlinkedExecutableBuilder b, FunctionBody body) {
+    if (body is BlockFunctionBody || body is ExpressionFunctionBody) {
+      for (UnlinkedParamBuilder parameter in b.parameters) {
+        parameter.visibleOffset = body.offset;
+        parameter.visibleLength = body.length;
+      }
+    }
     List<UnlinkedExecutableBuilder> oldExecutables = executables;
     List<UnlinkedVariableBuilder> oldVariables = variables;
     executables = <UnlinkedExecutableBuilder>[];
     variables = <UnlinkedVariableBuilder>[];
     body.accept(this);
     b.localFunctions = executables;
     b.localVariables = variables;
     executables = oldExecutables;
     variables = oldVariables;
   }
@@ skipping 498 matching lines @@
 /**
  * A [_TypeParameterScope] is a [_Scope] which defines [_ScopedTypeParameter]s.
  */
 class _TypeParameterScope extends _Scope {
   /**
    * Get the number of [_ScopedTypeParameter]s defined in this
    * [_TypeParameterScope].
    */
   int get length => _definedNames.length;
 }