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Auto merge of #89551 - jhpratt:stabilize-const_raw_ptr_deref, r=oli-obk
Stabilize `const_raw_ptr_deref` for `*const T` This stabilizes dereferencing immutable raw pointers in const contexts. It does not stabilize `*mut T` dereferencing. This is behind the same feature gate as mutable references. closes #51911
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Original file line number | Diff line number | Diff line change |
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@@ -1,7 +1,7 @@ | ||
// Check that you can't dereference raw pointers in constants. | ||
// Check that you can't dereference invalid raw pointers in constants. | ||
|
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fn main() { | ||
static C: u64 = unsafe {*(0xdeadbeef as *const u64)}; | ||
//~^ ERROR dereferencing raw pointers in statics is unstable | ||
//~^ ERROR could not evaluate static initializer | ||
println!("{}", C); | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -1,12 +1,9 @@ | ||
error[E0658]: dereferencing raw pointers in statics is unstable | ||
error[E0080]: could not evaluate static initializer | ||
--> $DIR/const-deref-ptr.rs:4:29 | ||
| | ||
LL | static C: u64 = unsafe {*(0xdeadbeef as *const u64)}; | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | ||
| | ||
= note: see issue #51911 <https://github.com/rust-lang/rust/issues/51911> for more information | ||
= help: add `#![feature(const_raw_ptr_deref)]` to the crate attributes to enable | ||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 0xdeadbeef is not a valid pointer | ||
|
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error: aborting due to previous error | ||
|
||
For more information about this error, try `rustc --explain E0658`. | ||
For more information about this error, try `rustc --explain E0080`. |
19 changes: 0 additions & 19 deletions
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src/test/ui/consts/const-eval/assign-to-static-within-other-static-2.rs
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src/test/ui/consts/const-eval/assign-to-static-within-other-static-2.stderr
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src/test/ui/consts/const-eval/assign-to-static-within-other-static.rs
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src/test/ui/consts/const-eval/assign-to-static-within-other-static.stderr
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Original file line number | Diff line number | Diff line change |
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@@ -1,5 +1,3 @@ | ||
#![feature(const_raw_ptr_deref)] | ||
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fn main() {} | ||
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// fine | ||
|
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6 changes: 3 additions & 3 deletions
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_errors.stderr
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_nontransient.rs
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_nontransient_fail.rs
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_nontransient_fail.stderr
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_transient.rs
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.32bit.stderr
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_uninit.64bit.stderr
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src/test/ui/consts/const-eval/heap/alloc_intrinsic_untyped.stderr
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src/test/ui/consts/const-eval/mod-static-with-const-fn.stderr
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Original file line number | Diff line number | Diff line change |
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@@ -1,12 +1,9 @@ | ||
error[E0658]: mutation through a reference is not allowed in statics | ||
error[E0080]: could not evaluate static initializer | ||
--> $DIR/mod-static-with-const-fn.rs:16:5 | ||
| | ||
LL | *FOO.0.get() = 5; | ||
| ^^^^^^^^^^^^^^^^ | ||
| | ||
= note: see issue #57349 <https://github.com/rust-lang/rust/issues/57349> for more information | ||
= help: add `#![feature(const_mut_refs)]` to the crate attributes to enable | ||
| ^^^^^^^^^^^^^^^^ modifying a static's initial value from another static's initializer | ||
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error: aborting due to previous error | ||
|
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For more information about this error, try `rustc --explain E0658`. | ||
For more information about this error, try `rustc --explain E0080`. |
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