note: trace_macro
  --> $DIR/trace-macro.rs:15:5
   |
LL |     println!("Hello, World!");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: expanding `println! { "Hello, World!" }`
   = note: to `print ! ( "{}/n" , format_args ! ( "Hello, World!" ) )`
   = note: expanding `print! { "{}/n" , format_args ! ( "Hello, World!" ) }`
   = note: to `$crate :: io :: _print (
           format_args ! ( "{}/n" , format_args ! ( "Hello, World!" ) ) )`