error[E0599]: no method named `map` found for type `std::iter::Map<postgres::rows::Iter<'_>, for<'r, 's> fn(postgres::rows::Row<'r>, &'s extract::CmdOptions) -> std::result::Result<<Q as extract::query::Query>::Message, postgres::Error> {<Q as extract::query::Query>::map}>` in the current scope
  --> extract/tests/query/../helper.rs:40:10
   |
40 |         .map(Result::unwrap)

binary: rustc
commit-hash: 827013a31b88e536e85b8e6ceb5b9988042ec335
commit-date: 2018-05-25
host: x86_64-unknown-linux-gnu
release: 1.26.1
LLVM version: 6.0