error: format argument must be a string literal
 --> $DIR/format-argument-must-be-a-string-literal.rs:5:14
  |
5 |     println!(42);
  |              ^^
  |
help: you might be missing a string literal to format with
  |
5 |     println!("{}", 42);
  |              ^^^^^

error: format argument must be a string literal
 --> $DIR/format-argument-must-be-a-string-literal.rs:8:14
  |
8 |     println!(x);
  |              ^
  |
help: you might be missing a string literal to format with
  |
8 |     println!("{}", x);
  |              ^^^^^