checkbuild doesn't complain about duplicate META6.json keys

[coke]

https://github.com/coke/raku-zef-deps/blob/221ce84cd8c4c89b61c305a93c93308e1ee6c1e2/META6.json

has two copies of test-depends, caused no trouble.

[coke]

... to be fair, it seems to cause no trouble anywhere, but it would be nice to catch these before uploading, in my opinion.

[tony-o]

Hmm, I'm going to add this as a feature request. That json is valid even though it contains duplicate keys, it requires a custom parser to detect as the internal json parser is unbothered by it, following is the dump from the rakudo json parser:

Hash %result = {:auth("zef:coke"),
                :authors($["Will Coleda"]),
                :depends($["Zef:ver<0.14.2+>", 
                           "Zef::Client:ver<0.14.2+>", 
                           "Zef::Config:ver<0.14.2+>", 
                           "JSON::Fast"]),
                :description("Tool to show dependencies on raku modules given by zef"),           
                :license("Artistic-2.0"), 
                :name("App::Zef-Deps"), 
                :perl("6"), 
                :provides(${"App::Zef-Deps" => "lib/App/Zef-Deps.rakumod"}), 
                :resources($[]), 
                :source-url("git://github.com/coke/raku-zef-deps.git"), 
                :tags($[]), 
                :test-depends($[]), 
                :version("0.9.5")}