tests/ui/const-generics/function_arg_const_generics/const-param-variadic.stderr

error: unexpected `...`
  --> $DIR/const-param-variadic.rs:3:17
   |
LL | fn foo(const X: ...) {}
   |                 ^^^
   |
   = note: only `extern "C"` and `extern "C-unwind"` functions may have a C variable argument list

error: aborting due to 1 previous error