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Avoid UB in clippy transmute_ptr_to_ptr UI test

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This commit is contained in:
Urgau 2023-12-17 17:28:24 +01:00
parent 05101ffe5b
commit f2064f7165
3 changed files with 11 additions and 11 deletions
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6
tests/ui/transmute_ptr_to_ptr.fixed
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@ -35,7 +35,7 @@ fn transmute_ptr_to_ptr() {
// ref-ref transmutes; bad
let _: &f32 = &*(&1u32 as *const u32 as *const f32);
//~^ ERROR: transmute from a reference to a reference
let _: &f64 = &*(&1f32 as *const f32 as *const f64);
let _: &f32 = &*(&1f64 as *const f64 as *const f32);
//~^ ERROR: transmute from a reference to a reference
//:^ this test is here because both f32 and f64 are the same TypeVariant, but they are not
// the same type
@ -43,8 +43,8 @@ fn transmute_ptr_to_ptr() {
//~^ ERROR: transmute from a reference to a reference
let _: &GenericParam<f32> = &*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>);
//~^ ERROR: transmute from a reference to a reference
let u8_ref: &u8 = &0u8;
let u64_ref: &u64 = unsafe { &*(u8_ref as *const u8 as *const u64) };
let u64_ref: &u64 = &0u64;
let u8_ref: &u8 = unsafe { &*(u64_ref as *const u64 as *const u8) };
//~^ ERROR: transmute from a reference to a reference
}

6
tests/ui/transmute_ptr_to_ptr.rs
View File

@ -35,7 +35,7 @@ fn transmute_ptr_to_ptr() {
// ref-ref transmutes; bad
let _: &f32 = std::mem::transmute(&1u32);
//~^ ERROR: transmute from a reference to a reference
let _: &f64 = std::mem::transmute(&1f32);
let _: &f32 = std::mem::transmute(&1f64);
//~^ ERROR: transmute from a reference to a reference
//:^ this test is here because both f32 and f64 are the same TypeVariant, but they are not
// the same type
@ -43,8 +43,8 @@ fn transmute_ptr_to_ptr() {
//~^ ERROR: transmute from a reference to a reference
let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t: 1u32 });
//~^ ERROR: transmute from a reference to a reference
let u8_ref: &u8 = &0u8;
let u64_ref: &u64 = unsafe { std::mem::transmute(u8_ref) };
let u64_ref: &u64 = &0u64;
let u8_ref: &u8 = unsafe { std::mem::transmute(u64_ref) };
//~^ ERROR: transmute from a reference to a reference
}

10
tests/ui/transmute_ptr_to_ptr.stderr
View File

@ -22,8 +22,8 @@ LL | let _: &f32 = std::mem::transmute(&1u32);
error: transmute from a reference to a reference
--> $DIR/transmute_ptr_to_ptr.rs:38:23
|
LL | let _: &f64 = std::mem::transmute(&1f32);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&1f32 as *const f32 as *const f64)`
LL | let _: &f32 = std::mem::transmute(&1f64);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&1f64 as *const f64 as *const f32)`
error: transmute from a reference to a reference
--> $DIR/transmute_ptr_to_ptr.rs:42:27
@ -38,10 +38,10 @@ LL | let _: &GenericParam<f32> = std::mem::transmute(&GenericParam { t:
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(&GenericParam { t: 1u32 } as *const GenericParam<u32> as *const GenericParam<f32>)`
error: transmute from a reference to a reference
--> $DIR/transmute_ptr_to_ptr.rs:47:38
--> $DIR/transmute_ptr_to_ptr.rs:47:36
|
LL | let u64_ref: &u64 = unsafe { std::mem::transmute(u8_ref) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(u8_ref as *const u8 as *const u64)`
LL | let u8_ref: &u8 = unsafe { std::mem::transmute(u64_ref) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `&*(u64_ref as *const u64 as *const u8)`
error: aborting due to 7 previous errors