• since Types (and their constructors) in private modules are considered private #13047 the constructors in private modules are private too
• also the autogenerated getters are private
• as an (unwanted) consequence code using .name syntax across libraries started to fail
• that's incorrect: access to .name should be resolved inside of its defining module and thus be allowed
• usage of \x -> x.name workarounds the problem for the Types (and their constructors) in private modules are considered private #13047 PR

Originally posted by @JaroslavTulach in #13047 (comment)