Flutter - 开发常见问题

build_runner 报错

NoSuchMethodError: Closure call with mismatched arguments: function 'MutablePackageTree.allPackages'
Receiver: Closure: (_SyncIterator<Package>) => bool
Tried calling: MutablePackageTree.allPackages()
Found: MutablePackageTree.allPackages(_SyncIterator<Package>) => bool
dart:core                                                              _SyncIterable.iterator
package:package_config/src/package_config_impl.dart 26:36              new SimplePackageConfig
package:package_config/src/package_config_json.dart 213:10             parsePackageConfigJson
package:package_config/src/package_config_json.dart 45:10              parsePackageConfigBytes
package:package_config/src/package_config_io.dart 117:10               readPackageConfigJsonFile
package:package_config/src/discovery.dart 109:18                       findPackagConfigInDirectory
package:package_config/src/discovery.dart 44:31                        findPackageConfig
package:package_config/package_config.dart 114:5                       findPackageConfig
package:build_runner_core/src/package_graph/package_graph.dart 74:15   PackageGraph.forPath
package:build_runner_core/src/package_graph/package_graph.dart 110:20  PackageGraph.forThisPackage
package:build_runner/src/entrypoint/run.dart 22:64                     run
.dart_tool/build/entrypoint/build.dart 26:22                           main

解决： flutter clean