error: any use of this value will cause an error --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL | LL | copy_nonoverlapping(src, tmp.as_mut_ptr(), 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | | | unable to copy parts of a pointer from memory at ALLOC | inside `std::ptr::read::` at $SRC_DIR/core/src/ptr/mod.rs:LL:COL | inside `ptr::const_ptr::::read` at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL | inside `C` at $DIR/issue-miri-1910.rs:8:5 | ::: $DIR/issue-miri-1910.rs:5:1 | LL | const C: () = unsafe { | ----------- | = note: `#[deny(const_err)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported error: aborting due to previous error Future incompatibility report: Future breakage diagnostic: error: any use of this value will cause an error --> $SRC_DIR/core/src/ptr/mod.rs:LL:COL | LL | copy_nonoverlapping(src, tmp.as_mut_ptr(), 1); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | | | unable to copy parts of a pointer from memory at ALLOC | inside `std::ptr::read::` at $SRC_DIR/core/src/ptr/mod.rs:LL:COL | inside `ptr::const_ptr::::read` at $SRC_DIR/core/src/ptr/const_ptr.rs:LL:COL | inside `C` at $DIR/issue-miri-1910.rs:8:5 | ::: $DIR/issue-miri-1910.rs:5:1 | LL | const C: () = unsafe { | ----------- | = note: `#[deny(const_err)]` on by default = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release! = note: for more information, see issue #71800 = help: this code performed an operation that depends on the underlying bytes representing a pointer = help: the absolute address of a pointer is not known at compile-time, so such operations are not supported