Demonstration of an issue with cargo-udeps

Related tags

Miscellaneous udeps-false-negative
Overview

the setup

  • lib1 exports a function
  • lib2 contains a dependency to lib1, and calls into lib1's method
  • binary contains a dependency to lib2, and uses it
  • binary contains an unused dependency to lib1 (it's not used directly, but it's referenced in the Cargo.toml file)

output of cargo-udeps

➜ cargo +nightly udeps
    Checking lib1 v0.1.0 (/tmp/benjamin/lib1)
    Checking lib2 v0.1.0 (/tmp/benjamin/lib2)
    Checking udeps-test-case v0.1.0 (/tmp/benjamin)
    Finished dev [unoptimized + debuginfo] target(s) in 0.76s
info: Loading save analysis from "/tmp/benjamin/target/debug/deps/save-analysis/udeps_test_case-1e86a6794399c1a0.json"
All deps seem to have been used.
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