1 error: only foreign or `unsafe extern "C"` functions may be C-variadic
2 --> $DIR/issue-83499-input-output-iteration-ice.rs:7:16
4 LL | fn foo(_: Bar, ...) -> impl {}
7 error: at least one trait must be specified
8 --> $DIR/issue-83499-input-output-iteration-ice.rs:7:24
10 LL | fn foo(_: Bar, ...) -> impl {}
13 error[E0412]: cannot find type `Bar` in this scope
14 --> $DIR/issue-83499-input-output-iteration-ice.rs:7:11
16 LL | fn foo(_: Bar, ...) -> impl {}
17 | ^^^ not found in this scope
19 error: aborting due to 3 previous errors
21 For more information about this error, try `rustc --explain E0412`.