package:crclib/catalog.dart not found about crclib.dart HOT 3 CLOSED

$ cat pubspec.yaml 
name: test
environment:
        sdk: ">=2.7.0 <3.0.0"
dependencies:
        crclib: ^2.0.0
publish_to: none
$ /usr/lib/google-dartlang/bin/pub get
Resolving dependencies... (1.1s)
+ crclib 2.0.0
+ matcher 0.12.10
+ meta 1.3.0
+ path 1.8.0
+ quiver 2.1.5 (3.0.1 available)
+ stack_trace 1.10.0
+ tuple 1.0.3 (2.0.0 available)
Downloading crclib 2.0.0...
Downloading tuple 1.0.3...
Downloading meta 1.3.0...
Downloading quiver 2.1.5...
Downloading matcher 0.12.10...
Downloading stack_trace 1.10.0...
Downloading path 1.8.0...
Changed 7 dependencies!
$ cat main.dart
import 'package:crclib/catalog.dart';

int main() {
  print(Crc32().convert([0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39]).toRadixString(16));
  return 0;
}
$ /usr/lib/google-dartlang/bin/dart main.dart 
cbf43926