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test/codegen/expect/collection/src/canonicalized_map.js

 dart_library.library('collection/src/canonicalized_map', null, /* Imports */[
   'dart/_runtime',
   'dart/core',
   'collection/src/utils',
   'dart/collection'
 ], /* Lazy imports */[
 ], function(exports, dart, core, utils, collection) {
   'use strict';
   let dartx = dart.dartx;
   const _base = Symbol('_base');
@@ skipping 24 matching lines @@
         (() => {
           dart.as(key, K);
           dart.as(value, V);
           if (!dart.notNull(this[_isValidKey](key))) return;
           this[_base][dartx.set](dart.as(dart.dcall(this[_canonicalize], key), C), new (utils.Pair$(K, V))(key, value));
         })();
         return value;
       }
       addAll(other) {
         dart.as(other, core.Map$(K, V));
-        other[dartx.forEach](dart.fn((key, value) => this.set(key, value), V, [K, V]));
+        other[dartx.forEach](dart.fn((key, value) => {
+          dart.as(key, K);
+          dart.as(value, V);
+          return this.set(key, value);
+        }, V, [K, V]));
       }
       clear() {
         this[_base][dartx.clear]();
       }
       containsKey(key) {
         if (!dart.notNull(this[_isValidKey](key))) return false;
         return this[_base][dartx.containsKey](dart.dcall(this[_canonicalize], key));
       }
       containsValue(value) {
-        return this[_base][dartx.values][dartx.any](dart.fn(pair => dart.equals(pair.last, value), core.bool, [utils.Pair$(K, V)]));
+        return this[_base][dartx.values][dartx.any](dart.fn(pair => {
+          dart.as(pair, utils.Pair$(K, V));
+          return dart.equals(pair.last, value);
+        }, core.bool, [utils.Pair$(K, V)]));
       }
       forEach(f) {
         dart.as(f, dart.functionType(dart.void, [K, V]));
-        this[_base][dartx.forEach](dart.fn((key, pair) => f(pair.first, pair.last), dart.void, [C, utils.Pair$(K, V)]));
+        this[_base][dartx.forEach](dart.fn((key, pair) => {
+          dart.as(key, C);
+          dart.as(pair, utils.Pair$(K, V));
+          return f(pair.first, pair.last);
+        }, dart.void, [C, utils.Pair$(K, V)]));
       }
       get isEmpty() {
         return this[_base][dartx.isEmpty];
       }
       get isNotEmpty() {
         return this[_base][dartx.isNotEmpty];
       }
       get keys() {
-        return this[_base][dartx.values][dartx.map](dart.fn(pair => pair.first, K, [utils.Pair$(K, V)]));
+        return this[_base][dartx.values][dartx.map](dart.fn(pair => {
+          dart.as(pair, utils.Pair$(K, V));
+          return pair.first;
+        }, K, [utils.Pair$(K, V)]));
       }
       get length() {
         return this[_base][dartx.length];
       }
       putIfAbsent(key, ifAbsent) {
         dart.as(key, K);
         dart.as(ifAbsent, dart.functionType(V, []));
         return this[_base][dartx.putIfAbsent](dart.as(dart.dcall(this[_canonicalize], key), C), dart.fn(() => new (utils.Pair$(K, V))(key, ifAbsent()), utils.Pair$(K, V), [])).last;
       }
       remove(key) {
         if (!dart.notNull(this[_isValidKey](key))) return null;
         let pair = this[_base][dartx.remove](dart.dcall(this[_canonicalize], key));
         return pair == null ? null : pair.last;
       }
       get values() {
-        return this[_base][dartx.values][dartx.map](dart.fn(pair => pair.last, V, [utils.Pair$(K, V)]));
+        return this[_base][dartx.values][dartx.map](dart.fn(pair => {
+          dart.as(pair, utils.Pair$(K, V));
+          return pair.last;
+        }, V, [utils.Pair$(K, V)]));
       }
       toString() {
         return collection.Maps.mapToString(this);
       }
       [_isValidKey](key) {
         return (key == null || dart.is(key, K)) && (this[_isValidKeyFn] == null || dart.notNull(dart.as(dart.dcall(this[_isValidKeyFn], key), core.bool)));
       }
     }
     CanonicalizedMap[dart.implements] = () => [core.Map$(K, V)];
     dart.defineNamedConstructor(CanonicalizedMap, 'from');
@@ skipping 31 matching lines @@
       'length',
       'values'
     ]);
     return CanonicalizedMap;
   });
   let CanonicalizedMap = CanonicalizedMap$();
   // Exports:
   exports.CanonicalizedMap$ = CanonicalizedMap$;
   exports.CanonicalizedMap = CanonicalizedMap;
 });