message: Add #[track_caller] to panic helper function
  This will make the line reported in the panic point to a useful
  location instead of the helper function.
diff: @@ -680,6 +680,7 @@ impl Function {
  ))
  }
  + #[track_caller]
  fn closures_unsupported_panic() -> ! {
  unimplemented!("Closures (functions with captured environments) are currently unsupported with native functions. See: https://github.com/wasmerio/wasmer/issues/1840")
  }
  