error: missing parameters for function definition
  --> $DIR/removed-syntax-fn-sigil.rs:2:14
   |
LL |     let x: fn~() = || ();
   |              ^
   |
help: add a parameter list
   |
LL |     let x: fn()~() = || ();
   |              ++

error: expected one of `->`, `;`, or `=`, found `~`
  --> $DIR/removed-syntax-fn-sigil.rs:2:14
   |
LL |     let x: fn~() = || ();
   |          -   ^ expected one of `->`, `;`, or `=`
   |          |
   |          while parsing the type for `x`

error: aborting due to 2 previous errors