"run" tool doesn't give error for unknown option

[quintesse]

Opened here instead of "runtime" because it's almost surely a problem with the underlying framework (probably related to the use of the annotation @Rest)

Found when trying to execute ceylon run --no-default-repos default (the flag is called --no-default-repositories)

[tombentley]

Well how can the framework know what options and arguments an arbitrary ceylon module takes? Either the module itself takes responsibility for handing it's arguments (which is the situation we have today), or we force an annotation-based approach on all modules so that a framework can be used to validate options for all modules.

[quintesse]

But this is not an option for the module that's being run, it's a valid and known option for the run tool that appears before the final argument used by the run tool itself. I'm sure we can come up with some way separate one from the other (without reverting to the use of --).