error: Undefined Behavior: pointer not dereferenceable: pointer must be dereferenceable for 4 bytes, but got 0x10[noalloc] which is a dangling pointer (it has no provenance) --> tests/fail/dangling_pointers/deref-invalid-ptr.rs:LL:CC | LL | let _y = unsafe { &*x as *const u32 }; | ^^^ Undefined Behavior occurred here | = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information = note: BACKTRACE: = note: inside `main` at tests/fail/dangling_pointers/deref-invalid-ptr.rs:LL:CC note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace error: aborting due to 1 previous error