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add test for str as extern "C" arg causes compiler panic #80125

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Fixes #80125
This commit is contained in:
Matthias Krüger 2024-03-22 18:12:49 +01:00
parent a5ad0be52f
commit 19310ce2cc
2 changed files with 50 additions and 0 deletions
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15
tests/ui/extern/extern-C-str-arg-ice-80125.rs vendored Normal file
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@ -0,0 +1,15 @@
// test for #80125
//@ check-pass
type ExternCallback = extern "C" fn(*const u8, u32, str);
//~^ WARN `extern` fn uses type `str`, which is not FFI-safe
pub struct Struct(ExternCallback);
#[no_mangle]
pub extern "C" fn register_something(bind: ExternCallback) -> Struct {
//~^ WARN `extern` fn uses type `str`, which is not FFI-safe
//~^^ WARN `extern` fn uses type `Struct`, which is not FFI-safe
Struct(bind)
}
fn main() {}

35
tests/ui/extern/extern-C-str-arg-ice-80125.stderr vendored Normal file
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warning: `extern` fn uses type `str`, which is not FFI-safe
--> $DIR/extern-C-str-arg-ice-80125.rs:3:23
|
LL | type ExternCallback = extern "C" fn(*const u8, u32, str);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
|
= help: consider using `*const u8` and a length instead
= note: string slices have no C equivalent
= note: `#[warn(improper_ctypes_definitions)]` on by default
warning: `extern` fn uses type `str`, which is not FFI-safe
--> $DIR/extern-C-str-arg-ice-80125.rs:9:44
|
LL | pub extern "C" fn register_something(bind: ExternCallback) -> Struct {
| ^^^^^^^^^^^^^^ not FFI-safe
|
= help: consider using `*const u8` and a length instead
= note: string slices have no C equivalent
warning: `extern` fn uses type `Struct`, which is not FFI-safe
--> $DIR/extern-C-str-arg-ice-80125.rs:9:63
|
LL | pub extern "C" fn register_something(bind: ExternCallback) -> Struct {
| ^^^^^^ not FFI-safe
|
= help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
= note: this struct has unspecified layout
note: the type is defined here
--> $DIR/extern-C-str-arg-ice-80125.rs:6:1
|
LL | pub struct Struct(ExternCallback);
| ^^^^^^^^^^^^^^^^^
warning: 3 warnings emitted