Exception of parser for allowMultiple not handled #112
Description
Unhandled exception:
devserver: error: argument directories: Directory "a" not found.0 applyUsageToCommandInvocation.parseArg (package:unscripted/src/usage.dart:328:7)
1 applyUsageToCommandInvocation..parseValue (package:unscripted/src/usage.dart:360:36)
2 MappedListIterable.elementAt (dart:_internal/iterable.dart:413)
3 UnmodifiableListView.
4 Object&ListMixin.elementAt (dart:collection/list.dart:58)
5 ListIterator.moveNext (dart:_internal/iterable.dart:341)
6 StringBuffer.writeAll (dart:core-patch/string_buffer_patch.dart:86)
7 IterableBase.iterableToFullString (dart:collection/iterable.dart:264)
8 Object&ListMixin.toString (dart:collection/list.dart:513)
9 _StringBase._interpolateSingle (dart:core-patch/string_patch.dart:804)
10 print (dart:core/print.dart:9)
11 devServerArgs (package:bwu_dev_server/bin/main.dart:26:3)
12 Function._apply (dart:core-patch/function_patch.dart:7)
13 Function.apply (dart:core-patch/function_patch.dart:28)
14 FunctionScript._getTopCommandResult (package:unscripted/src/script_impl.dart:156:67)
15 DeclarationScript._handleResults (package:unscripted/src/script_impl.dart:107:21)
16 ScriptImpl.execute.. (package:unscripted/src/script_impl.dart:49:11)
17 _RootZone.runUnary (dart:async/zone.dart:1149)
18 _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:502)
19 _Future._propagateToListeners (dart:async/future_impl.dart:585)
20 _Future._completeWithValue (dart:async/future_impl.dart:376)
21 _Future._asyncComplete. (dart:async/future_impl.dart:430)
22 _microtaskLoop (dart:async/schedule_microtask.dart:43)
23 _microtaskLoopEntry (dart:async/schedule_microtask.dart:52)
24 _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:96)
25 _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:151)
Process finished with exit code 255
The doc for parser says
It should throw to indicate
/// that the argument is invalid.