Fix increment on nullable

test/codegen/expect/dart/_interceptors.js

 var _interceptors;
 (function(exports) {
   '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 271 matching lines @@
         _internal.IterableMixinWorkaround.setAllList(this, index, iterable);
       }
       removeLast() {
         this.checkGrowable('removeLast');
         if (this.length === 0)
           throw new core.RangeError.value(-1);
         return dart.as(this.pop(), E);
       }
       remove(element) {
         this.checkGrowable('remove');
-        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); dart.notNull(i)++) {
+        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
           if (dart.equals(this.get(i), element)) {
             this.splice(i, 1);
             return true;
           }
         }
         return false;
       }
       removeWhere(test) {
         _internal.IterableMixinWorkaround.removeWhereList(this, dart.as(test, dart.throw_("Unimplemented type (dynamic) → bool")));
       }
       retainWhere(test) {
         _internal.IterableMixinWorkaround.removeWhereList(this, dart.as((element) => !dart.notNull(test(element)), dart.throw_("Unimplemented type (dynamic) → bool")));
       }
       where(f) {
         return new _internal.IterableMixinWorkaround().where(this, dart.as(f, dart.throw_("Unimplemented type (dynamic) → bool")));
       }
       expand(f) {
         return _internal.IterableMixinWorkaround.expand(this, dart.as(f, dart.throw_("Unimplemented type (dynamic) → Iterable<dynamic>")));
       }
       addAll(collection) {
         for (let e of collection) {
           this.add(e);
         }
       }
       clear() {
         this.length = 0;
       }
       forEach(f) {
         let length = this.length;
-        for (let i = 0; dart.notNull(i) < dart.notNull(length); dart.notNull(i)++) {
+        for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
           f(dart.as(this[i], E));
           if (length !== this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
       }
       map(f) {
         return _internal.IterableMixinWorkaround.mapList(this, dart.as(f, dart.throw_("Unimplemented type (dynamic) → dynamic")));
       }
       join(separator) {
         if (separator === void 0)
           separator = "";
         let list = new core.List(this.length);
-        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); dart.notNull(i)++) {
+        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
           list.set(i, `${this.get(i)}`);
         }
         return list.join(separator);
       }
       take(n) {
         return new _internal.IterableMixinWorkaround().takeList(this, n);
       }
       takeWhile(test) {
         return new _internal.IterableMixinWorkaround().takeWhile(this, dart.as(test, dart.throw_("Unimplemented type (dynamic) → bool")));
       }
@@ skipping 117 matching lines @@
         if (start === void 0)
           start = 0;
         return _internal.IterableMixinWorkaround.indexOfList(this, element, start);
       }
       lastIndexOf(element, start) {
         if (start === void 0)
           start = null;
         return _internal.IterableMixinWorkaround.lastIndexOfList(this, element, start);
       }
       contains(other) {
-        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); dart.notNull(i)++) {
+        for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
           if (dart.equals(this.get(i), other))
             return true;
         }
         return false;
       }
       get isEmpty() {
         return this.length === 0;
       }
       get isNotEmpty() {
         return !dart.notNull(this.isEmpty);
@@ skipping 494 matching lines @@
       return _js_helper.allMatchesInStringUnchecked(this, string, start);
     }
     matchAsPrefix(string, start) {
       if (start === void 0)
         start = 0;
       if (dart.notNull(start) < 0 || dart.notNull(start) > dart.notNull(string.length)) {
         throw new core.RangeError.range(start, 0, string.length);
       }
       if (dart.notNull(start) + dart.notNull(this.length) > dart.notNull(string.length))
         return null;
-      for (let i = 0; dart.notNull(i) < dart.notNull(this.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
         if (string.codeUnitAt(dart.notNull(start) + dart.notNull(i)) !== this.codeUnitAt(i)) {
           return null;
         }
       }
       return new _js_helper.StringMatch(start, string, this);
     }
     ['+'](other) {
       if (!(typeof other == string))
         throw new core.ArgumentError(other);
       return this + other;
@@ skipping 138 matching lines @@
       }
     }
     static [_skipLeadingWhitespace](string, index) {
       let SPACE = 32;
       let CARRIAGE_RETURN = 13;
       while (dart.notNull(index) < dart.notNull(string.length)) {
         let codeUnit = string.codeUnitAt(index);
         if (codeUnit !== SPACE && codeUnit !== CARRIAGE_RETURN && !dart.notNull(_isWhitespace(codeUnit))) {
           break;
         }
-        dart.notNull(index)++;
+        index = dart.notNull(index) + 1;
       }
       return index;
     }
     static [_skipTrailingWhitespace](string, index) {
       let SPACE = 32;
       let CARRIAGE_RETURN = 13;
       while (dart.notNull(index) > 0) {
         let codeUnit = string.codeUnitAt(dart.notNull(index) - 1);
         if (codeUnit !== SPACE && codeUnit !== CARRIAGE_RETURN && !dart.notNull(_isWhitespace(codeUnit))) {
           break;
         }
-        dart.notNull(index)--;
+        index = dart.notNull(index) - 1;
       }
       return index;
     }
     trim() {
       let NEL = 133;
       let result = this.trim();
       if (result.length === 0)
         return result;
       let firstCode = result.codeUnitAt(0);
       let startIndex = 0;
@@ skipping 108 matching lines @@
         throw new core.RangeError.range(start, 0, this.length);
       }
       if (typeof pattern == string) {
         return this.indexOf(pattern, start);
       }
       if (dart.is(pattern, _js_helper.JSSyntaxRegExp)) {
         let re = pattern;
         let match = _js_helper.firstMatchAfter(re, this, start);
         return match === null ? -1 : match.start;
       }
-      for (let i = start; dart.notNull(i) <= dart.notNull(this.length); dart.notNull(i)++) {
+      for (let i = start; dart.notNull(i) <= dart.notNull(this.length); i = dart.notNull(i) + 1) {
         if (pattern.matchAsPrefix(this, i) !== null)
           return i;
       }
       return -1;
     }
     lastIndexOf(pattern, start) {
       if (start === void 0)
         start = null;
       _js_helper.checkNull(pattern);
       if (start === null) {
         start = this.length;
       } else if (!(typeof start == number)) {
         throw new core.ArgumentError(start);
       } else if (dart.notNull(start) < 0 || dart.notNull(start) > dart.notNull(this.length)) {
         throw new core.RangeError.range(start, 0, this.length);
       }
       if (typeof pattern == string) {
         let other = pattern;
         if (dart.notNull(start) + dart.notNull(other.length) > dart.notNull(this.length)) {
           start = dart.notNull(this.length) - dart.notNull(other.length);
         }
         return dart.as(_js_helper.stringLastIndexOfUnchecked(this, other, start), core.int);
       }
-      for (let i = start; dart.notNull(i) >= 0; dart.notNull(i)--) {
+      for (let i = start; dart.notNull(i) >= 0; i = dart.notNull(i) - 1) {
         if (pattern.matchAsPrefix(this, i) !== null)
           return i;
       }
       return -1;
     }
     contains(other, startIndex) {
       if (startIndex === void 0)
         startIndex = 0;
       _js_helper.checkNull(other);
       if (dart.notNull(startIndex) < 0 || dart.notNull(startIndex) > dart.notNull(this.length)) {
@@ skipping 10 matching lines @@
     compareTo(other) {
       if (!(typeof other == string))
         throw new core.ArgumentError(other);
       return dart.equals(this, other) ? 0 : this < other ? -1 : 1;
     }
     toString() {
       return this;
     }
     get hashCode() {
       let hash = 0;
-      for (let i = 0; dart.notNull(i) < dart.notNull(this.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
         hash = 536870911 & dart.notNull(hash) + this.charCodeAt(i);
         hash = 536870911 & dart.notNull(hash) + ((524287 & dart.notNull(hash)) << 10);
         hash = hash ^ hash >> 6;
       }
       hash = 536870911 & dart.notNull(hash) + ((67108863 & dart.notNull(hash)) << 3);
       hash = hash ^ hash >> 11;
       return 536870911 & dart.notNull(hash) + ((16383 & dart.notNull(hash)) << 15);
     }
     get runtimeType() {
       return core.String;
@@ skipping 55 matching lines @@
   exports.JSExtendableArray = JSExtendableArray;
   exports.JSExtendableArray$ = JSExtendableArray$;
   exports.JSNumber = JSNumber;
   exports.JSInt = JSInt;
   exports.JSDouble = JSDouble;
   exports.JSPositiveInt = JSPositiveInt;
   exports.JSUInt32 = JSUInt32;
   exports.JSUInt31 = JSUInt31;
   exports.JSString = JSString;
 })(_interceptors || (_interceptors = {}));