proc-macro-error-attr2 is used at run time in 2,313 crates (of which 605 optionally). It is a direct run-time dependency in 1 crate. It's used at build time in 168 crates (of which 70 optionally, ). It's used only as a dev dependency in 134 crates.

Depender (with downloads and own rev deps) proc-macro-error-attr2 version
2.7M 73 proc-macro-error2 =2.0.0