Which crates call a vulnerable function? Which deprecated functions are central to crates.io and should not be deleted? Am I breaking important clients and their dependencies with my new release? These are questions that package publishers and owners of package repositories crave for answers to. To solve this problem, we created RustPräzi: a call-based dependency network that represents a gigantic single large versioned call graph of all crates.io packages. In this talk, I will describe how Rust

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