How to pass arguments to dependent tasks?

[jakemac53]

See this serve task as an example, https://github.com/dart-lang/dart-pad/blob/b9a426f73c1b4dff267b7328d3c6fac964b560bd/tool/grind.dart#L28.

This depends on the build task, which accepts a --debug flag.

I want to run the serve task, with --debug set for the nested build task, but I can't figure out how to do it?

I tried grind serve build --debug, grind serve --debug, grind serve --debug build --debug, but none of those options work, they all ultimately end up with an error like this:

Unhandled exception:
GrinderException: Cannot run a task multiple times with different arguments
#0      Grinder._postOrder (package:grinder/src/grinder.dart:88:9)
#1      Grinder._postOrder (package:grinder/src/grinder.dart:78:7)
#2      Grinder.start (package:grinder/src/grinder.dart:168:7)
#3      runTasks (package:grinder/src/cli.dart:69:38)
#4      grind (package:grinder/grinder.dart:45:12)
#5      main (<redacted>/dart-pad/tool/grind.dart:21:28)
#6      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:295:32)
#7      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)

I did some debugging and it looks like the task is trying to run both with empty arguments and with ["--debug"]. So I think the dependency set up by serve is implicitly trying to run it with no arguments, or something like that?