anchor.diff:  
       FieldInfo info = new FieldInfo(
           name: element.name,
  -        // We use element.hashCode because it is globally unique and it is
  -        // available while we are doing codegen.
  -        coverageId: '${element.hashCode}',
           type: '${element.type}',
           inferredType: '$inferredType',
           code: code,
  
positive.code:     FunctionInfo info = new FunctionInfo(
          name: name,
          functionKind: kind,
          // We use element.hashCode because it is globally unique and it is
          // available while we are doing codegen.
          coverageId: '${element.hashCode}',
          modifiers: modifiers,
          returnType: returnType,
          inferredReturnType: inferredReturnType,
  
negative.code:       if (value != null) {
          info.initializer = _constantToInfo[value];
        }
      }
  
      if (JavaScriptBackend.TRACE_METHOD == 'post') {
        // We use element.hashCode because it is globally unique and it is
        // available while we are doing codegen.
        info.coverageId = '${element.hashCode}';
      }
  
      int closureSize = _addClosureInfo(info, element);
  