error: `#[debugger_visualizer]` attribute cannot be used on functions
  --> $DIR/invalid-debugger-visualizer-target.rs:1:1
   |
LL | #[debugger_visualizer(natvis_file = "./foo.natvis.xml")]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: `#[debugger_visualizer]` can be applied to modules and crates

error: aborting due to 1 previous error