error: Undefined Behavior: memory access failed: null pointer is a dangling pointer (it has no provenance) --> $DIR/copy_null.rs:LL:CC | LL | copy_nonoverlapping(std::ptr::null(), ptr, 0); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ memory access failed: null pointer is a dangling pointer (it has no provenance) | = 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/copy_null.rs:LL:CC note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace error: aborting due to previous error