Exception type: _TypeError

[kamaravichow]

FINE: Pub 3.4.0
FINE: Package Config up to date.
FINE: Package Config up to date.
ERR : Null check operator used on a null value
FINE: Exception type: _TypeError
ERR : package:pub/src/package_graph.dart 73:55 PackageGraph.transitiveDependencies..
| dart:core Iterable.toSet
| package:pub/src/package_graph.dart 73:58 PackageGraph.transitiveDependencies.
| package:pub/src/utils.dart 690:41 mapMap
| package:pub/src/package_graph.dart 70:11 PackageGraph.transitiveDependencies
| package:pub/src/package_graph.dart 99:12 PackageGraph.isPackageMutable
| package:pub/src/executable.dart 103:41 runExecutable
| ===== asynchronous gap ===========================
| package:pub/src/global_packages.dart 445:12 GlobalPackages.runExecutable
| ===== asynchronous gap ===========================
| package:pub/src/command/global_run.dart 77:22 GlobalRunCommand.runProtected
| ===== asynchronous gap ===========================
| package:pub/src/command.dart 196:7 PubCommand.run
| ===== asynchronous gap ===========================
| package:args/command_runner.dart 212:13 CommandRunner.runCommand
| ===== asynchronous gap ===========================
| package:dartdev/dartdev.dart 232:18 DartdevRunner.runCommand
| ===== asynchronous gap ===========================
| package:dartdev/dartdev.dart 46:16 runDartdev
| ===== asynchronous gap ===========================
| /Volumes/Work/s/w/ir/x/w/sdk/pkg/dartdev/bin/dartdev.dart 13:5 main
ERR : This is an unexpected error. The full log and other details are collected in:
|
| /Users/NAME/.pub-cache/log/pub_log.txt
|
| Consider creating an issue on https://github.com/dart-lang/pub/issues/new
| and attaching the relevant parts of that log file.
---- End log transcript ----

[kamaravichow]

Looks like a duplicate of #3946 . Try the workaround there.