error[E0460]: found possibly newer version of crate `a` which `b` depends on --> $DIR/svh-change-significant-cfg.rs:8:1 | LL | extern crate b; | ^^^^^^^^^^^^^^^ | = note: perhaps that crate needs to be recompiled? = note: the following crate versions were found: crate `a`: $PATH_a crate `b`: $PATH_b error: aborting due to previous error For more information about this error, try `rustc --explain E0460`.