error: `extern` block uses type `A`, which is not FFI-safe | |
--> $DIR/opaque-ty-ffi-unsafe.rs:12:17 | |
| | |
LL | pub fn a(_: A); | |
| ^ not FFI-safe | |
| | |
note: lint level defined here | |
--> $DIR/opaque-ty-ffi-unsafe.rs:3:9 | |
| | |
LL | #![deny(improper_ctypes)] | |
| ^^^^^^^^^^^^^^^ | |
= note: opaque types have no C equivalent | |
error: aborting due to previous error | |