1 error: Undefined Behavior: ptr_offset_from_unsigned called when first pointer has smaller offset than second: 0 < 4
2 --> RUSTLIB/core/src/ptr/const_ptr.rs:LL:CC
4 LL | unsafe { intrinsics::ptr_offset_from_unsigned(self, origin) }
5 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ptr_offset_from_unsigned called when first pointer has smaller offset than second: 0 < 4
7 = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
8 = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
10 = note: inside `std::ptr::const_ptr::<impl *const u8>::sub_ptr` at RUSTLIB/core/src/ptr/const_ptr.rs:LL:CC
11 note: inside `main` at $DIR/ptr_offset_from_unsigned_neg.rs:LL:CC
12 --> $DIR/ptr_offset_from_unsigned_neg.rs:LL:CC
14 LL | let _val = unsafe { ptr1.sub_ptr(ptr2) };
17 note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace
19 error: aborting due to previous error