error: Undefined Behavior: incorrect number of arguments for `open` with `O_CREAT`: got 2, expected at least 3
  --> $DIR/unix_open_missing_required_mode.rs:LL:CC
   |
LL | ...safe { libc::open(name_ptr, libc::O_CREAT) };
   |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ incorrect number of arguments for `open` with `O_CREAT`: got 2, expected at least 3
   |
   = 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 `test_file_open_missing_needed_mode` at $DIR/unix_open_missing_required_mode.rs:LL:CC
note: inside `main` at $DIR/unix_open_missing_required_mode.rs:LL:CC
  --> $DIR/unix_open_missing_required_mode.rs:LL:CC
   |
LL |     test_file_open_missing_needed_mode();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

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

error: aborting due to previous error