error: mixing `-Zregparm` will cause an ABI mismatch in crate `incompatible_regparm`
  --> $DIR/incompatible_regparm.rs:11:1
   |
LL | #![feature(no_core)]
   | ^
   |
   = help: the `-Zregparm` flag modifies the ABI so Rust crates compiled with different values of this flag cannot be used together safely
   = note: `-Zregparm=1` in this crate is incompatible with `-Zregparm=2` in dependency `wrong_regparm`
   = help: set `-Zregparm=2` in this crate or `-Zregparm=1` in `wrong_regparm`
   = help: if you are sure this will not cause problems, you may use `-Cunsafe-allow-abi-mismatch=regparm` to silence this error

error: aborting due to 1 previous error