Typecheck constructor initializers properly

test/codegen/expect/core/core.js

 var core;
 (function(core) {
   'use strict';
   // Function _symbolToString: (Symbol) → String
   function _symbolToString(symbol) {
     return _internal.Symbol.getName(dart.as(symbol, _internal.Symbol));
   }
   // Function _symbolMapToStringMap: (Map<Symbol, dynamic>) → dynamic
   function _symbolMapToStringMap(map) {
     if (map === null)
@@ skipping 237 matching lines @@
     subtract(duration) {
       let ms = this.millisecondsSinceEpoch;
       return new DateTime.fromMillisecondsSinceEpoch(ms - duration.inMilliseconds, {isUtc: this.isUtc});
     }
     difference(other) {
       let ms = this.millisecondsSinceEpoch;
       let otherMs = other.millisecondsSinceEpoch;
       return new Duration({milliseconds: ms - otherMs});
     }
     DateTime$_internal(year, month, day, hour, minute, second, millisecond, isUtc) {
-      this.isUtc = typeof isUtc == boolean ? isUtc : dart.throw_(new ArgumentError(isUtc));
-      this.millisecondsSinceEpoch = dart.dinvokef(/* Unimplemented unknown name */checkInt, dart.dinvoke(/* Unimplemented unknown name */Primitives, 'valueFromDecomposedDate', year, month, day, hour, minute, second, millisecond, isUtc));
+      this.isUtc = dart.as(typeof isUtc == boolean ? isUtc : dart.throw_(new ArgumentError(isUtc)), bool);
+      this.millisecondsSinceEpoch = dart.as(dart.dinvokef(/* Unimplemented unknown name */checkInt, dart.dinvoke(/* Unimplemented unknown name */Primitives, 'valueFromDecomposedDate', year, month, day, hour, minute, second, millisecond, isUtc)), int);
     }
     DateTime$_now() {
       this.isUtc = false;
-      this.millisecondsSinceEpoch = dart.dinvoke(/* Unimplemented unknown name */Primitives, 'dateNow');
+      this.millisecondsSinceEpoch = dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'dateNow'), int);
     }
     static _brokenDownDateToMillisecondsSinceEpoch(year, month, day, hour, minute, second, millisecond, isUtc) {
       return dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'valueFromDecomposedDate', year, month, day, hour, minute, second, millisecond, isUtc), int);
     }
     get timeZoneName() {
       if (this.isUtc)
         return "UTC";
       return dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getTimeZoneName', this), String);
     }
     get timeZoneOffset() {
       if (this.isUtc)
         return new Duration();
-      return new Duration({minutes: dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getTimeZoneOffsetInMinutes', this)});
+      return new Duration({minutes: dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getTimeZoneOffsetInMinutes', this), int)});
     }
     get year() {
       return dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getYear', this), int);
     }
     get month() {
       return dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getMonth', this), int);
     }
     get day() {
       return dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'getDay', this), int);
     }
@@ skipping 320 matching lines @@
           endName = "end";
         throw new RangeError.range(end, start, length, endName, message);
       }
     }
     static checkNotNegative(value, name, message) {
       if (name === void 0)
         name = null;
       if (message === void 0)
         message = null;
       if (value < 0)
-        throw new RangeError.range(value, 0, null, name, message);
+        throw new RangeError.range(value, 0, dart.as(null, int), name, message);
     }
     toString() {
       if (!dart.notNull(this._hasValue))
         return `RangeError: ${this.message}`;
       let value = Error.safeToString(this.invalidValue);
       let explanation = "";
       if (this.start === null) {
         if (this.end !== null) {
           explanation = `: Not less than or equal to ${this.end}`;
         }
@@ skipping 14 matching lines @@
   dart.defineNamedConstructor(RangeError, 'index');
   class IndexError extends ArgumentError {
     IndexError(invalidValue, indexable, name, message, length) {
       if (name === void 0)
         name = null;
       if (message === void 0)
         message = null;
       if (length === void 0)
         length = null;
       this.indexable = indexable;
-      this.length = length !== null ? length : dart.dload(indexable, 'length');
+      this.length = dart.as(length !== null ? length : dart.dload(indexable, 'length'), int);
       super.ArgumentError$value(invalidValue, name, message !== null ? message : "Index out of range");
     }
     get start() {
       return 0;
     }
     get end() {
       return this.length - 1;
     }
     toString() {
       dart.assert(this._hasValue);
@@ skipping 362 matching lines @@
     }
     dart.defineNamedConstructor(Iterable, 'generate');
     return Iterable;
   });
   let Iterable = Iterable$(dynamic);
   let _GeneratorIterable$ = dart.generic(function(E) {
     class _GeneratorIterable extends collection.IterableBase$(E) {
       _GeneratorIterable(_end, generator) {
         this._end = _end;
         this._start = 0;
-        this._generator = generator !== null ? generator : _id;
+        this._generator = dart.as(generator !== null ? generator : _id, _Generator);
         super.IterableBase();
       }
       _GeneratorIterable$slice(_start, _end, _generator) {
         this._start = _start;
         this._end = _end;
         this._generator = _generator;
         super.IterableBase();
       }
       get iterator() {
         return new _GeneratorIterator(this._start, this._end, this._generator);
@@ skipping 839 matching lines @@
         for (; hostEnd < authority.length; hostEnd++) {
           if (authority.codeUnitAt(hostEnd) === _COLON) {
             let portString = authority.substring(hostEnd + 1);
             if (portString.isNotEmpty)
               port = int.parse(portString);
             break;
           }
         }
         host = authority.substring(hostStart, hostEnd);
       }
-      return new Uri({scheme: scheme, userInfo: userInfo, host: host, port: port, pathSegments: unencodedPath.split("/"), queryParameters: queryParameters});
+      return new Uri({scheme: scheme, userInfo: userInfo, host: dart.as(host, String), port: dart.as(port, int), pathSegments: unencodedPath.split("/"), queryParameters: queryParameters});
     }
     Uri$file(path, opt$) {
       let windows = opt$.windows === void 0 ? null : opt$.windows;
       windows = windows === null ? Uri._isWindows : windows;
       return dart.as(windows ? _makeWindowsFileUrl(path) : _makeFileUri(path), Uri);
     }
     static get base() {
       let uri = dart.as(dart.dinvoke(/* Unimplemented unknown name */Primitives, 'currentUri'), String);
       if (uri !== null)
         return Uri.parse(uri);
@@ skipping 401 matching lines @@
         let index = 0;
         while (--encodedBytes >= 0) {
           let byte = dart.as(dart.dbinary(dart.dbinary(dart.dbinary(char, '>>', 6 * encodedBytes), '&', 63), '|', flag), int);
           codeUnits.set(index, _PERCENT);
           codeUnits.set(index + 1, hexDigits.codeUnitAt(byte >> 4));
           codeUnits.set(index + 2, hexDigits.codeUnitAt(byte & 15));
           index = 3;
           flag = 128;
         }
       }
-      return new String.fromCharCodes(codeUnits);
+      return new String.fromCharCodes(dart.as(codeUnits, Iterable$(int)));
     }
     static _normalize(component, start, end, charTable) {
       let buffer = null;
       let sectionStart = start;
       let index = start;
       while (index < end) {
         let char = component.codeUnitAt(index);
         if (dart.notNull(char < 127) && dart.notNull((charTable.get(char >> 4) & 1 << (char & 15)) !== 0)) {
           index++;
         } else {
@@ skipping 340 matching lines @@
       if (start === void 0)
         start = 0;
       if (end === void 0)
         end = null;
       if (end === null)
         end = host.length;
       // Function error: (String, [dynamic]) → void
       function error(msg, position) {
         if (position === void 0)
           position = null;
-        throw new FormatException(`Illegal IPv6 address, ${msg}`, host, position);
+        throw new FormatException(`Illegal IPv6 address, ${msg}`, host, dart.as(position, int));
       }
       // Function parseHex: (int, int) → int
       function parseHex(start, end) {
         if (end - start > 4) {
           error('an IPv6 part can only contain a maximum of 4 hex digits', start);
         }
         let value = int.parse(host.substring(start, end), {radix: 16});
         if (dart.notNull(value < 0) || dart.notNull(value > (1 << 16) - 1)) {
           error('each part must be in the range of `0x0..0xFFFF`', start);
         }
@@ skipping 259 matching lines @@
   core.Stopwatch = Stopwatch;
   core.String = String;
   core.Runes = Runes;
   core.RuneIterator = RuneIterator;
   core.StringBuffer = StringBuffer;
   core.StringSink = StringSink;
   core.Symbol = Symbol;
   core.Type = Type;
   core.Uri = Uri;
 })(core || (core = {}));