error: Undefined Behavior: pointer to ALLOC was dereferenced after this allocation got freed
  --> $DIR/dangling_pointer_addr_of.rs:LL:CC
   |
LL |     let x = unsafe { ptr::addr_of!(*p) };
   |                      ^^^^^^^^^^^^^^^^^ pointer to ALLOC was dereferenced after this allocation got freed
   |
   = 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 RUSTLIB/core/src/ptr/mod.rs:LL:CC
   = note: this error originates in the macro `ptr::addr_of` (in Nightly builds, run with -Z macro-backtrace for more info)

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to previous error