Use itertools::zip_eq

Author: estebank

compiler/rustc_mir_build/src/build/expr/into.rs

@@ -1,7 +1,5 @@
 //! See docs in build/expr/mod.rs
 
-use std::iter;
-
 use rustc_ast::{AsmMacro, InlineAsmOptions};
 use rustc_data_structures::fx::FxHashMap;
 use rustc_data_structures::stack::ensure_sufficient_stack;
@@ -357,7 +355,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                         // We desugar FRU as we lower to MIR, so for each
                         // base-supplied field, generate an operand that
                         // reads it from the base.
-                        iter::zip(field_names, &**field_types)
+                        itertools::zip_eq(field_names, &**field_types)
                             .map(|(n, ty)| match fields_map.get(&n) {
                                 Some(v) => v.clone(),
                                 None => {
@@ -369,7 +367,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                             .collect()
                     }
                     AdtExprBase::DefaultFields(field_types) => {
-                        iter::zip(field_names, &**field_types)
+                        itertools::zip_eq(field_names, &**field_types)
                             .map(|(n, ty)| match fields_map.get(&n) {
                                 Some(v) => v.clone(),
                                 None => match variant.fields[n].value {