It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) debugger_test_parser version
14.4M 1592 smallvec dev ^0.1.0
11.5M 143 tinyvec dev ^0.1
1.6M 186 widestring dev ^0.1
1.9K 4 debugger_test dev ^0.1.0
supply-chain-trust-example-crate-000085 dev ^0.1