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ptr_metadata test: avoid ptr-to-int transmutes #95516

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Merged
bors merged 1 commit into from
Apr 1, 2022
Merged

ptr_metadata test: avoid ptr-to-int transmutes #95516

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10 changes: 5 additions & 5 deletions library/core/tests/ptr.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -490,11 +490,11 @@ fn ptr_metadata() {
let vtable_5: DynMetadata<dyn Display> =
metadata(&Pair(true, 7_u32) as &Pair<bool, dyn Display>);
unsafe {
let address_1: usize = std::mem::transmute(vtable_1);
let address_2: usize = std::mem::transmute(vtable_2);
let address_3: usize = std::mem::transmute(vtable_3);
let address_4: usize = std::mem::transmute(vtable_4);
let address_5: usize = std::mem::transmute(vtable_5);
let address_1: *const () = std::mem::transmute(vtable_1);
let address_2: *const () = std::mem::transmute(vtable_2);
let address_3: *const () = std::mem::transmute(vtable_3);
let address_4: *const () = std::mem::transmute(vtable_4);
let address_5: *const () = std::mem::transmute(vtable_5);
// Different trait => different vtable pointer
assert_ne!(address_1, address_2);
// Different erased type => different vtable pointer
Expand Down