error[E0599]: the method `quote_into_iter` exists for struct `Ipv4Addr`, but its trait bounds were not satisfied --> tests/ui/not-repeatable.rs:7:13 | 3 | struct Ipv4Addr; | --------------- method `quote_into_iter` not found for this struct because it doesn't satisfy `Ipv4Addr: Iterator`, `Ipv4Addr: ToTokens`, `Ipv4Addr: ext::RepIteratorExt` or `Ipv4Addr: ext::RepToTokensExt` ... 7 | let _ = quote! { #(#ip)* }; | ^^^^^^^^^^^^^^^^^^ method cannot be called on `Ipv4Addr` due to unsatisfied trait bounds | = note: the following trait bounds were not satisfied: `Ipv4Addr: Iterator` which is required by `Ipv4Addr: ext::RepIteratorExt` `&Ipv4Addr: Iterator` which is required by `&Ipv4Addr: ext::RepIteratorExt` `Ipv4Addr: ToTokens` which is required by `Ipv4Addr: ext::RepToTokensExt` `&mut Ipv4Addr: Iterator` which is required by `&mut Ipv4Addr: ext::RepIteratorExt` note: the traits `Iterator` and `ToTokens` must be implemented --> src/to_tokens.rs | | pub trait ToTokens { | ^^^^^^^^^^^^^^^^^^ | ::: $RUST/core/src/iter/traits/iterator.rs | | pub trait Iterator { | ^^^^^^^^^^^^^^^^^^ = help: items from traits can only be used if the trait is implemented and in scope = note: the following traits define an item `quote_into_iter`, perhaps you need to implement one of them: candidate #1: `ext::RepAsIteratorExt` candidate #2: `ext::RepIteratorExt` candidate #3: `ext::RepToTokensExt` = note: this error originates in the macro `$crate::quote_bind_into_iter` which comes from the expansion of the macro `quote` (in Nightly builds, run with -Z macro-backtrace for more info)