Running nccs at master gives Unhandled Exception

[devhawk]

Unhandled exception: System.ArgumentException: The SetHandler call for command 'nccs' is missing an Argument or Option for the parameter at position 0. Did you mean to pass one of these?

at System.CommandLine.Handler.GetValueForHandlerParameter[T](IValueDescriptor[] symbols, Int32& index, InvocationContext context)
at System.CommandLine.Handler.<>c__DisplayClass4_0`4.b__0(InvocationContext context)
at System.CommandLine.Invocation.AnonymousCommandHandler.<>c__DisplayClass2_0.<.ctor>g__Handle|0(InvocationContext context)
at System.CommandLine.Invocation.AnonymousCommandHandler.InvokeAsync(InvocationContext context)
at System.CommandLine.Invocation.InvocationPipeline.<>c__DisplayClass4_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass18_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass13_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass22_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass20_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c.<b__19_0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass17_0.<b__0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c.<b__6_0>d.MoveNext()
--- End of stack trace from previous location ---
at System.CommandLine.Builder.CommandLineBuilderExtensions.<>c__DisplayClass9_0.<b__0>d.MoveNext()

[devhawk]

Appears to be caused by the move to System.CommandLine Version 2.0.0-beta3 and the line

            rootCommand.SetHandler<RootCommand, Options, string[], InvocationContext>(Handle);

[devhawk]

@shargon @erikzhang this appears to be from #713

[devhawk]

Yes, reverting the command line package, the SetHandler call and the Handle method code to the previous commit seems to solve the issue

[Jim8y]

This either be a bug or the new version does not support string[]. Suggest rollback System.CommandLine @shargon

Problem solve by change string[] to string. But its gonna change the logic of command line

[shargon]

If use IEnumerable<string> it works?

[Jim8y]

Nope

[erikzhang]

Revert? But sooner or later we will have to upgrade.

[shargon]

Please check #724