Fix increment on nullable

test/codegen/expect/dart/_isolate_helper.js

 var _isolate_helper;
 (function(exports) {
   'use strict';
   // Function _callInIsolate: (_IsolateContext, Function) → dynamic
   function _callInIsolate(isolate, function) {
     let result = isolate.eval(function);
     exports._globalState.topEventLoop.run();
     return result;
   }
   let _activeJsAsyncCount = Symbol('_activeJsAsyncCount');
   // Function enterJsAsync: () → dynamic
   function enterJsAsync() {
-    dart.notNull(exports._globalState.topEventLoop[_activeJsAsyncCount])++;
+    exports._globalState.topEventLoop[_activeJsAsyncCount] = dart.notNull(exports._globalState.topEventLoop[_activeJsAsyncCount]) + 1;
   }
   // Function leaveJsAsync: () → dynamic
   function leaveJsAsync() {
-    dart.notNull(exports._globalState.topEventLoop[_activeJsAsyncCount])--;
+    exports._globalState.topEventLoop[_activeJsAsyncCount] = dart.notNull(exports._globalState.topEventLoop[_activeJsAsyncCount]) - 1;
     dart.assert(dart.notNull(exports._globalState.topEventLoop[_activeJsAsyncCount]) >= 0);
   }
   // Function isWorker: () → bool
   function isWorker() {
     return exports._globalState.isWorker;
   }
   // Function _currentIsolate: () → _IsolateContext
   function _currentIsolate() {
     return exports._globalState.currentContext;
   }
@@ skipping 97 matching lines @@
     }
   }
   let _scheduledControlEvents = Symbol('_scheduledControlEvents');
   let _isExecutingEvent = Symbol('_isExecutingEvent');
   let _id = Symbol('_id');
   let _updateGlobalState = Symbol('_updateGlobalState');
   let _setGlobals = Symbol('_setGlobals');
   let _addRegistration = Symbol('_addRegistration');
   class _IsolateContext extends dart.Object {
     _IsolateContext() {
-      this.id = dart.notNull(exports._globalState.nextIsolateId)++;
+      this.id = (($tmp) => exports._globalState.nextIsolateId = dart.notNull($tmp) + 1, $tmp).bind(this)(exports._globalState.nextIsolateId);
       this.ports = new core.Map();
       this.weakPorts = new core.Set();
       this.isolateStatics = _foreign_helper.JS_CREATE_ISOLATE();
       this.controlPort = new RawReceivePortImpl._controlPort();
       this.pauseCapability = new isolate.Capability();
       this.terminateCapability = new isolate.Capability();
       this.delayedEvents = dart.as(new List.from([]), core.List$(_IsolateEvent));
       this.pauseTokens = dart.as(new core.Set(), core.Set$(isolate.Capability));
       this.errorPorts = dart.as(new core.Set(), core.Set$(isolate.SendPort));
       this.initialized = false;
@@ skipping 555 matching lines @@
         };
       }(_foreign_helper.DART_CLOSURE_TO_JS(workerOnError), uri, onError);
       worker.onerror = onerrorTrampoline;
       let processWorkerMessageTrampoline = function(f, a) {
         return function(e) {
           e.onerror = null;
           return f(a, e);
         };
       }(_foreign_helper.DART_CLOSURE_TO_JS(_processWorkerMessage), worker);
       worker.onmessage = processWorkerMessageTrampoline;
-      let workerId = dart.notNull(exports._globalState.nextManagerId)++;
+      let workerId = (($tmp) => exports._globalState.nextManagerId = dart.notNull($tmp) + 1, $tmp).bind(this)(exports._globalState.nextManagerId);
       workerIds.set(worker, workerId);
       exports._globalState.managers.set(workerId, worker);
       worker.postMessage(_serializeMessage(dart.map({command: 'start', id: workerId, replyTo: _serializeMessage(replyPort), args: args, msg: _serializeMessage(message), isSpawnUri: isSpawnUri, startPaused: startPaused, functionName: functionName})));
     }
     static workerOnError(event, uri, onError) {
       event.preventDefault();
       let message = dart.as(event.message, core.String);
       if (message === null) {
         message = `Error spawning worker for ${uri}`;
       } else {
@@ skipping 81 matching lines @@
     get hashCode() {
       return dart.notNull(this[_workerId]) << 16 ^ dart.notNull(this[_isolateId]) << 8 ^ dart.notNull(this[_receivePortId]);
     }
   }
   let _handler = Symbol('_handler');
   let _close = Symbol('_close');
   let _add = Symbol('_add');
   class RawReceivePortImpl extends dart.Object {
     RawReceivePortImpl($_handler) {
       this[_handler] = $_handler;
-      this[_id] = dart.notNull(_nextFreeId)++;
+      this[_id] = (($tmp) => _nextFreeId = dart.notNull($tmp) + 1, $tmp)(_nextFreeId);
       this[_isClosed] = false;
       exports._globalState.currentContext.register(this[_id], this);
     }
     RawReceivePortImpl$weak($_handler) {
       this[_handler] = $_handler;
-      this[_id] = dart.notNull(_nextFreeId)++;
+      this[_id] = (($tmp) => _nextFreeId = dart.notNull($tmp) + 1, $tmp)(_nextFreeId);
       this[_isClosed] = false;
       exports._globalState.currentContext.registerWeak(this[_id], this);
     }
     RawReceivePortImpl$_controlPort() {
       this[_handler] = null;
       this[_id] = 0;
       this[_isClosed] = false;
     }
     set handler(newHandler) {
       this[_handler] = newHandler;
@@ skipping 237 matching lines @@
       if (dart.is(indexable, _interceptors.JSMutableArray))
         return new List.from(["mutable", serialized]);
       if (dart.is(indexable, _interceptors.JSArray))
         return new List.from(["const", serialized]);
       this.unsupported(indexable, "Can't serialize indexable: ");
       return null;
     }
     serializeArray(x) {
       let serialized = new List.from([]);
       serialized.length = x.length;
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
         serialized.set(i, this.serialize(x.get(i)));
       }
       return serialized;
     }
     serializeArrayInPlace(x) {
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
         x.set(i, this.serialize(x.get(i)));
       }
       return x;
     }
     serializeMap(x) {
       let serializeTearOff = this.serialize;
       return new List.from(['map', x.keys.map(dart.as(serializeTearOff, dart.throw_("Unimplemented type (dynamic) → dynamic"))).toList(), x.values.map(dart.as(serializeTearOff, dart.throw_("Unimplemented type (dynamic) → dynamic"))).toList()]);
     }
     serializeJSObject(x) {
       if (!!x.constructor && x.constructor !== Object) {
         this.unsupported(x, "Only plain JS Objects are supported:");
       }
       let keys = dart.as(Object.keys(x), core.List);
       let values = new List.from([]);
       values.length = keys.length;
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
         values.set(i, this.serialize(x[keys.get(i)]));
       }
       return new List.from(['js-object', keys, values]);
     }
     serializeWorkerSendPort(x) {
       if (this[_serializeSendPorts]) {
         return new List.from(['sendport', x[_workerId], x[_isolateId], x[_receivePortId]]);
       }
       return new List.from(['raw sendport', x]);
     }
@@ skipping 82 matching lines @@
       this.deserializedObjects.add(result);
       return result;
     }
     deserializeTypedData(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'typed'));
       let result = dart.as(dart.dindex(x, 1), _native_typed_data.NativeTypedData);
       this.deserializedObjects.add(result);
       return result;
     }
     deserializeArrayInPlace(x) {
-      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(x.length); i = dart.notNull(i) + 1) {
         x.set(i, this.deserialize(x.get(i)));
       }
       return x;
     }
     deserializeFixed(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'fixed'));
       let result = dart.as(dart.dindex(x, 1), core.List);
       this.deserializedObjects.add(result);
       return new _interceptors.JSArray.markFixed(this.deserializeArrayInPlace(dart.as(result, _interceptors.JSArray)));
     }
@@ skipping 15 matching lines @@
       this.deserializedObjects.add(result);
       return new _interceptors.JSArray.markFixed(this.deserializeArrayInPlace(dart.as(result, _interceptors.JSArray)));
     }
     deserializeMap(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'map'));
       let keys = dart.as(dart.dindex(x, 1), core.List);
       let values = dart.as(dart.dindex(x, 2), core.List);
       let result = dart.map();
       this.deserializedObjects.add(result);
       keys = keys.map(this.deserialize).toList();
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
         result.set(keys.get(i), this.deserialize(values.get(i)));
       }
       return result;
     }
     deserializeSendPort(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'sendport'));
       let managerId = dart.as(dart.dindex(x, 1), core.int);
       let isolateId = dart.as(dart.dindex(x, 2), core.int);
       let receivePortId = dart.as(dart.dindex(x, 3), core.int);
       let result = null;
@@ skipping 16 matching lines @@
       let result = dart.as(dart.dindex(x, 1), isolate.SendPort);
       this.deserializedObjects.add(result);
       return result;
     }
     deserializeJSObject(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'js-object'));
       let keys = dart.as(dart.dindex(x, 1), core.List);
       let values = dart.as(dart.dindex(x, 2), core.List);
       let o = {};
       this.deserializedObjects.add(o);
-      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); dart.notNull(i)++) {
+      for (let i = 0; dart.notNull(i) < dart.notNull(keys.length); i = dart.notNull(i) + 1) {
         o[keys.get(i)] = this.deserialize(values.get(i));
       }
       return o;
     }
     deserializeClosure(x) {
       dart.assert(dart.equals(dart.dindex(x, 0), 'function'));
       let name = dart.as(dart.dindex(x, 1), core.String);
       let result = dart.as(IsolateNatives._getJSFunctionFromName(name), core.Function);
       this.deserializedObjects.add(result);
       return result;
@@ skipping 18 matching lines @@
   exports.globalWindow = globalWindow;
   exports.globalWorker = globalWorker;
   exports.globalPostMessageDefined = globalPostMessageDefined;
   exports.IsolateNatives = IsolateNatives;
   exports.RawReceivePortImpl = RawReceivePortImpl;
   exports.ReceivePortImpl = ReceivePortImpl;
   exports.TimerImpl = TimerImpl;
   exports.hasTimer = hasTimer;
   exports.CapabilityImpl = CapabilityImpl;
 })(_isolate_helper || (_isolate_helper = {}));