error[E0308]: mismatched types
  --> $DIR/non-whitespace-trimming-unicode.rs:4:415
   |
LL | ...♣♤♥♦♧♨♩♪♫♬♭♮♯♰♱♲♳♴♵♶♷♸♹♺♻♼♽♾♿⚀⚁⚂⚃⚄⚅⚆⚈⚉4"; let _: () = 42;  let _: &str = "🦀☀☁☂☃☄★☆☇☈☉☊☋☌☍☎☏☐☑☒☓  ☖☗☘☙☚☛☜☝☞☟☠☡☢☣☤☥☦☧☨☩☪☫☬☭☮☯☰☱☲☳☴☵☶☷☸☹☺☻☼☽       ...
   |                                                      --   ^^ expected `()`, found integer
   |                                                      |
   |                                                      expected due to this

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0308`.