error: Undefined Behavior: accessing memory with alignment ALIGN, but alignment ALIGN is required
  --> $DIR/intptrcast_alignment_check.rs:LL:CC
   |
LL |     unsafe { *u16_ptr = 2 };
   |              ^^^^^^^^^^^^ accessing memory with alignment ALIGN, but alignment ALIGN is required
   |
   = help: this usually indicates that your program performed an invalid operation and caused Undefined Behavior
   = help: but due to `-Zmiri-symbolic-alignment-check`, alignment errors can also be false positives
   = note: BACKTRACE:
   = note: inside `main` at $DIR/intptrcast_alignment_check.rs:LL:CC

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

error: aborting due to previous error