fix #214, check type of inferred initializing formal with default value

lib/runtime/dart/_internal.js

 dart.library('dart/_internal', null, /* Imports */[
   'dart/core',
   'dart/collection'
 ], /* Lazy imports */[
   'dart/math',
   'dart/_interceptors',
   'dart/_js_primitives'
 ], function(exports, core, collection, math, _interceptors, _js_primitives) {
   'use strict';
   class EfficientLength extends core.Object {}
@@ skipping 740 matching lines @@
   });
   let TakeIterator = TakeIterator$();
   let TakeWhileIterable$ = dart.generic(function(E) {
     class TakeWhileIterable extends collection.IterableBase$(E) {
       TakeWhileIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
-        return new (TakeWhileIterator$(E))(this[_iterable][dartx.iterator], dart.as(this[_f], __CastType2));
+        return new (TakeWhileIterator$(E))(this[_iterable][dartx.iterator], this[_f]);
       }
     }
     dart.setSignature(TakeWhileIterable, {
       constructors: () => ({TakeWhileIterable: [TakeWhileIterable$(E), [core.Iterable$(E), dart.functionType(core.bool, [E])]]})
     });
     dart.defineExtensionMembers(TakeWhileIterable, ['iterator']);
     return TakeWhileIterable;
   });
   let TakeWhileIterable = TakeWhileIterable$();
   let _isFinished = dart.JsSymbol('_isFinished');
   let TakeWhileIterator$ = dart.generic(function(E) {
     class TakeWhileIterator extends core.Iterator$(E) {
       TakeWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_isFinished] = false;
       }
       moveNext() {
         if (dart.notNull(this[_isFinished]))
           return false;
-        if (!dart.notNull(this[_iterator].moveNext()) || !dart.notNull(dart.dcall(this[_f], this[_iterator].current))) {
+        if (!dart.notNull(this[_iterator].moveNext()) || !dart.notNull(this[_f](this[_iterator].current))) {
           this[_isFinished] = true;
           return false;
         }
         return true;
       }
       get current() {
         if (dart.notNull(this[_isFinished]))
           return null;
         return this[_iterator].current;
       }
@@ skipping 91 matching lines @@
   });
   let SkipIterator = SkipIterator$();
   let SkipWhileIterable$ = dart.generic(function(E) {
     class SkipWhileIterable extends collection.IterableBase$(E) {
       SkipWhileIterable(iterable, f) {
         this[_iterable] = iterable;
         this[_f] = f;
         super.IterableBase();
       }
       get iterator() {
-        return new (SkipWhileIterator$(E))(this[_iterable][dartx.iterator], dart.as(this[_f], __CastType4));
+        return new (SkipWhileIterator$(E))(this[_iterable][dartx.iterator], this[_f]);
       }
     }
     dart.setSignature(SkipWhileIterable, {
       constructors: () => ({SkipWhileIterable: [SkipWhileIterable$(E), [core.Iterable$(E), dart.functionType(core.bool, [E])]]})
     });
     dart.defineExtensionMembers(SkipWhileIterable, ['iterator']);
     return SkipWhileIterable;
   });
   let SkipWhileIterable = SkipWhileIterable$();
   let _hasSkipped = dart.JsSymbol('_hasSkipped');
   let SkipWhileIterator$ = dart.generic(function(E) {
     class SkipWhileIterator extends core.Iterator$(E) {
       SkipWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_hasSkipped] = false;
       }
       moveNext() {
         if (!dart.notNull(this[_hasSkipped])) {
           this[_hasSkipped] = true;
           while (dart.notNull(this[_iterator].moveNext())) {
-            if (!dart.notNull(dart.dcall(this[_f], this[_iterator].current)))
+            if (!dart.notNull(this[_f](this[_iterator].current)))
               return true;
           }
         }
         return this[_iterator].moveNext();
       }
       get current() {
         return this[_iterator].current;
       }
     }
     dart.setSignature(SkipWhileIterator, {
@@ skipping 381 matching lines @@
           buffer.write(list[dartx.get](0));
           for (let i = 1; dart.notNull(i) < dart.notNull(list.length); i = dart.notNull(i) + 1) {
             buffer.write(separator);
             buffer.write(list[dartx.get](i));
           }
         }
         return dart.toString(buffer);
       }
       where(iterable, f) {
         dart.as(f, dart.functionType(core.bool, [dart.bottom]));
-        return new (WhereIterable$(T))(dart.as(iterable, core.Iterable$(T)), dart.as(f, __CastType6));
+        return new (WhereIterable$(T))(dart.as(iterable, core.Iterable$(T)), dart.as(f, __CastType2));
       }
       static map(iterable, f) {
         dart.as(f, dart.functionType(core.Object, [dart.bottom]));
         return MappedIterable.new(iterable, f);
       }
       static mapList(list, f) {
         dart.as(f, dart.functionType(core.Object, [dart.bottom]));
         return new MappedListIterable(list, f);
       }
       static expand(iterable, f) {
@@ skipping 239 matching lines @@
       tooMany: [core.StateError, []],
       tooFew: [core.StateError, []]
     }),
     names: ['noElement', 'tooMany', 'tooFew']
   });
   let __CastType0$ = dart.generic(function(S, T) {
     let __CastType0 = dart.typedef('__CastType0', () => dart.functionType(core.Iterable$(T), [S]));
     return __CastType0;
   });
   let __CastType0 = __CastType0$();
-  let __CastType2$ = dart.generic(function(E) {
-    let __CastType2 = dart.typedef('__CastType2', () => dart.functionType(core.bool, [E]));
+  let __CastType2$ = dart.generic(function(T) {
+    let __CastType2 = dart.typedef('__CastType2', () => dart.functionType(core.bool, [T]));
     return __CastType2;
   });
   let __CastType2 = __CastType2$();
-  let __CastType4$ = dart.generic(function(E) {
-    let __CastType4 = dart.typedef('__CastType4', () => dart.functionType(core.bool, [E]));
-    return __CastType4;
-  });
-  let __CastType4 = __CastType4$();
-  let __CastType6$ = dart.generic(function(T) {
-    let __CastType6 = dart.typedef('__CastType6', () => dart.functionType(core.bool, [T]));
-    return __CastType6;
-  });
-  let __CastType6 = __CastType6$();
   let FixedLengthListMixin$ = dart.generic(function(E) {
     class FixedLengthListMixin extends core.Object {
       set length(newLength) {
         throw new core.UnsupportedError("Cannot change the length of a fixed-length list");
       }
       add(value) {
         dart.as(value, E);
         throw new core.UnsupportedError("Cannot add to a fixed-length list");
       }
       insert(index, value) {
@@ skipping 843 matching lines @@
   exports.ReversedListIterable = ReversedListIterable;
   exports.UnmodifiableListError = UnmodifiableListError;
   exports.NonGrowableListError = NonGrowableListError;
   exports.makeListFixedLength = makeListFixedLength;
   exports.Lists = Lists;
   exports.printToConsole = printToConsole;
   exports.Sort = Sort;
   exports.Symbol = Symbol;
   exports.POWERS_OF_TEN = POWERS_OF_TEN;
 });