error: Undefined Behavior: out-of-bounds offset_from: ALLOC has size 4, so pointer at offset 10 is out-of-bounds
  --> $DIR/ptr_offset_from_oob.rs:LL:CC
   |
LL |     unsafe { end_ptr.offset_from(end_ptr) };
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ out-of-bounds offset_from: ALLOC has size 4, so pointer at offset 10 is out-of-bounds
   |
   = 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 $DIR/ptr_offset_from_oob.rs:LL:CC

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

error: aborting due to previous error