#![deny(improper_ctypes)] // Intentionally not #[repr(C)] pub struct Foo; #[repr(C)] // Expect error here that Bar is marked repr(C) but contains fn ptr referencing non-repr(C) type pub struct Bar { // Alternatively expect error here that extern fn contains type that is non-repr(C). pub f: unsafe extern "system" fn(arg: *const Foo) } extern "system"{ pub fn baz(bar: *const Bar); // Actually get error here implying Bar is not marked repr(C) even though it is } fn main() { }error: found non-foreign-function-safe member in struct marked #[repr(C)]: found struct without foreign-function-safe representation annotation in foreign module, consider adding a #[repr(C)] attribute to the type --> src/main.rs:12:21 | 12 | pub fn baz(bar: *const Bar); // Actually get error here implying Bar is not marked repr(C) even though it is | ^^^^^^^^^^ | note: lint level defined here --> src/main.rs:1:9 | 1 | #![deny(improper_ctypes)] | ^^^^^^^^^^^^^^^ error: aborting due to previous error
