fix temp used in postfix ops

lib/runtime/dart/_js_helper.js

 var _js_helper;
 (function(exports) {
   'use strict';
   class NoSideEffects extends core.Object {
     NoSideEffects() {
     }
   }
   class NoThrows extends core.Object {
     NoThrows() {
     }
@@ skipping 1656 matching lines @@
         let positions = dart.map();
         for (let i = 0; dart.notNull(i) < dart.notNull(this.optionalParameterCount); i = dart.notNull(i) + 1) {
           let index = dart.notNull(this.requiredParameterCount) + dart.notNull(i);
           positions.set(this.parameterName(index), index);
         }
         let index = 0;
         ((_$) => {
           _$.sort();
           return _$;
         }).bind(this)(positions.keys.toList()).forEach(((name) => {
-          this.cachedSortedIndices.set(((x) => index = dart.notNull(x$) + 1, x$)(index), positions.get(name));
+          this.cachedSortedIndices.set(((x$) => index = dart.notNull(x$) + 1, x$)(index), positions.get(name));
         }).bind(this));
       }
       return dart.as(this.cachedSortedIndices.get(unsortedIndex), core.int);
     }
     computeFunctionRti(jsConstructor) {
       if (typeof this.functionType == "number") {
         return getMetadata(dart.as(this.functionType, core.int));
       } else if (typeof this.functionType == "function") {
         let fakeInstance = new jsConstructor();
         setRuntimeTypeInfo(fakeInstance, fakeInstance["<>"]);
@@ skipping 823 matching lines @@
       return dart.as(dart.dload(object, 'hashCode'), core.int);
     } else {
       return Primitives.objectHashCode(object);
     }
   }
   // Function fillLiteralMap: (dynamic, Map<dynamic, dynamic>) → dynamic
   function fillLiteralMap(keyValuePairs, result) {
     let index = 0;
     let length = getLength(keyValuePairs);
     while (dart.notNull(index) < dart.notNull(length)) {
-      let key = getIndex(keyValuePairs, ((x) => index = dart.notNull(x$) + 1, x$)(index));
-      let value = getIndex(keyValuePairs, ((x) => index = dart.notNull(x$) + 1, x$)(index));
+      let key = getIndex(keyValuePairs, ((x$) => index = dart.notNull(x$) + 1, x$)(index));
+      let value = getIndex(keyValuePairs, ((x$) => index = dart.notNull(x$) + 1, x$)(index));
       result.set(key, value);
     }
     return result;
   }
   // Function invokeClosure: (Function, dynamic, int, dynamic, dynamic, dynamic, dynamic) → dynamic
   function invokeClosure(closure, isolate, numberOfArguments, arg1, arg2, arg3, arg4) {
     if (numberOfArguments === 0) {
       return _foreign_helper.JS_CALL_IN_ISOLATE(isolate, () => dart.dinvokef(closure));
     } else if (numberOfArguments === 1) {
       return _foreign_helper.JS_CALL_IN_ISOLATE(isolate, () => dart.dinvokef(closure, arg1));
@@ skipping 35 matching lines @@
       let callName = dart.as(func.$callName, core.String);
       func.$reflectionInfo = reflectionInfo;
       let info = new ReflectionInfo(func);
       let functionType = info.functionType;
       let prototype = isStatic ? Object.create(new TearOffClosure().constructor.prototype) : Object.create(new BoundClosure(null, null, null, null).constructor.prototype);
       prototype.$initialize = prototype.constructor;
       let constructor = isStatic ? function() {
         this.$initialize();
       } : isCsp ? function(a, b, c, d) {
         this.$initialize(a, b, c, d);
-      } : new Function("a", "b", "c", "d", "this.$initialize(a,b,c,d);" + ((x) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter));
+      } : new Function("a", "b", "c", "d", "this.$initialize(a,b,c,d);" + ((x$) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter));
       prototype.constructor = constructor;
       constructor.prototype = prototype;
       let trampoline = func;
       let isIntercepted = false;
       if (!dart.notNull(isStatic)) {
         if (jsArguments.length == 1) {
           isIntercepted = true;
         }
         trampoline = forwardCallTo(receiver, func, isIntercepted);
         trampoline.$reflectionInfo = reflectionInfo;
@@ skipping 86 matching lines @@
       if (isIntercepted)
         return forwardInterceptedCallTo(receiver, func);
       let stubName = dart.as(func.$stubName, core.String);
       let arity = func.length;
       let lookedUpFunction = receiver[stubName];
       let isSuperCall = !dart.notNull(core.identical(func, lookedUpFunction));
       if (dart.notNull(isCsp) || dart.notNull(isSuperCall) || dart.notNull(arity) >= 27) {
         return cspForwardCall(arity, isSuperCall, stubName, func);
       }
       if (arity === 0) {
-        return new Function('return function(){' + `return this.${BoundClosure.selfFieldName()}.${stubName}();` + `${((x) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
+        return new Function('return function(){' + `return this.${BoundClosure.selfFieldName()}.${stubName}();` + `${((x$) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
       }
       dart.assert(1 <= dart.notNull(arity) && dart.notNull(arity) < 27);
       let arguments = "abcdefghijklmnopqrstuvwxyz".split("").splice(0, arity).join(",");
-      return new Function(`return function(${arguments}){` + `return this.${BoundClosure.selfFieldName()}.${stubName}(${arguments});` + `${((x) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
+      return new Function(`return function(${arguments}){` + `return this.${BoundClosure.selfFieldName()}.${stubName}(${arguments});` + `${((x$) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
     }
     static cspForwardInterceptedCall(arity, isSuperCall, name, func) {
       let getSelf = _foreign_helper.RAW_DART_FUNCTION_REF(BoundClosure.selfOf);
       let getReceiver = _foreign_helper.RAW_DART_FUNCTION_REF(BoundClosure.receiverOf);
       if (isSuperCall)
         arity = -1;
       switch (arity) {
         case 0:
           throw new RuntimeError('Intercepted function with no arguments.');
         case 1:
@@ skipping 47 matching lines @@
       let receiverField = BoundClosure.receiverFieldName();
       let stubName = dart.as(func.$stubName, core.String);
       let arity = func.length;
       let isCsp = typeof dart_precompiled == "function";
       let lookedUpFunction = receiver[stubName];
       let isSuperCall = !dart.notNull(core.identical(func, lookedUpFunction));
       if (dart.notNull(isCsp) || dart.notNull(isSuperCall) || dart.notNull(arity) >= 28) {
         return cspForwardInterceptedCall(arity, isSuperCall, stubName, func);
       }
       if (arity === 1) {
-        return new Function('return function(){' + `return this.${selfField}.${stubName}(this.${receiverField});` + `${((x) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
+        return new Function('return function(){' + `return this.${selfField}.${stubName}(this.${receiverField});` + `${((x$) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
       }
       dart.assert(1 < dart.notNull(arity) && dart.notNull(arity) < 28);
       let arguments = "abcdefghijklmnopqrstuvwxyz".split("").splice(0, dart.notNull(arity) - 1).join(",");
-      return new Function(`return function(${arguments}){` + `return this.${selfField}.${stubName}(this.${receiverField}, ${arguments});` + `${((x) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
+      return new Function(`return function(${arguments}){` + `return this.${selfField}.${stubName}(this.${receiverField}, ${arguments});` + `${((x$) => functionCounter = dart.notNull(x$) + 1, x$)(functionCounter)}` + '}')();
     }
     toString() {
       return "Closure";
     }
   }
   Closure.FUNCTION_INDEX = 0;
   Closure.NAME_INDEX = 1;
   Closure.CALL_NAME_INDEX = 2;
   Closure.REQUIRED_PARAMETER_INDEX = 3;
   Closure.OPTIONAL_PARAMETER_INDEX = 4;
@@ skipping 1178 matching lines @@
   exports.UnimplementedNoSuchMethodError = UnimplementedNoSuchMethodError;
   exports.random64 = random64;
   exports.jsonEncodeNative = jsonEncodeNative;
   exports.getIsolateAffinityTag = getIsolateAffinityTag;
   exports.loadDeferredLibrary = loadDeferredLibrary;
   exports.MainError = MainError;
   exports.missingMain = missingMain;
   exports.badMain = badMain;
   exports.mainHasTooManyParameters = mainHasTooManyParameters;
 })(_js_helper || (_js_helper = {}));