[bug] Direct compilation of errors under the latest version of flutter

[elinxer]

flutter version： v1.5.8
all is newest at this time, i just import and then compilation throw this error.

Compiler message:
file:///home/elinx/.pub-cache/hosted/pub.flutter-io.cn/cached_network_image-0.6.2/lib/src/cached_network_image_provider.dart:46:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable<DiagnosticsNode> Function()'.
 - 'StringBuffer' is from 'dart:core'.
 - 'Iterable' is from 'dart:core'.
 - 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///home/elinx/app/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
Try changing the type of the parameter, or casting the argument to 'Iterable<DiagnosticsNode> Function()'.
        informationCollector: (StringBuffer information) {

[SGZoom]

v1.5.9-pre.258

cached_network_image-0.4.2/lib/cached_network_image.dart:464:31: Error: The argument type 'Null Function(StringBuffer)' can't be assigned to the parameter type 'Iterable Function()'.

• 'StringBuffer' is from 'dart:core'.
• 'Iterable' is from 'dart:core'.
• 'DiagnosticsNode' is from 'package:flutter/src/foundation/diagnostics.dart' ('file:///E:/softeware/flutter/flutter/packages/flutter/lib/src/foundation/diagnostics.dart').
  Try changing the type of the parameter, or casting the argument to 'Iterable Function()'.
  informationCollector: (StringBuffer information) {
  ^

[renefloor]

That's exactly why I released version 0.8.0.

[elinxer]

Thinks you are.

[SGZoom]

Thank you :)