fixes #206, add checking for unary ops

lib/runtime/dart/_internal.js

 var _internal = dart.defineLibrary(_internal, {});
 var core = dart.import(core);
 var collection = dart.import(collection);
 var math = dart.lazyImport(math);
 var _interceptors = dart.lazyImport(_interceptors);
 var _js_primitives = dart.lazyImport(_js_primitives);
 (function(exports, core, collection, math, _interceptors, _js_primitives) {
   'use strict';
   class EfficientLength extends core.Object {}
   let ListIterable$ = dart.generic(function(E) {
@@ skipping 54 matching lines @@
           if (length != this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
         return true;
       }
       any(test) {
         dart.as(test, dart.functionType(core.bool, [E]));
         let length = this.length;
         for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
-          if (test(this.elementAt(i)))
+          if (dart.notNull(test(this.elementAt(i))))
             return true;
           if (length != this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
         return false;
       }
       firstWhere(test, opts) {
         dart.as(test, dart.functionType(core.bool, [E]));
         let orElse = opts && 'orElse' in opts ? opts.orElse : null;
         dart.as(orElse, dart.functionType(E, []));
         let length = this.length;
         for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
           let element = this.elementAt(i);
-          if (test(element))
+          if (dart.notNull(test(element)))
             return element;
           if (length != this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
         if (orElse != null)
           return orElse();
         throw IterableElementError.noElement();
       }
       lastWhere(test, opts) {
         dart.as(test, dart.functionType(core.bool, [E]));
         let orElse = opts && 'orElse' in opts ? opts.orElse : null;
         dart.as(orElse, dart.functionType(E, []));
         let length = this.length;
         for (let i = dart.notNull(length) - 1; dart.notNull(i) >= 0; i = dart.notNull(i) - 1) {
           let element = this.elementAt(i);
-          if (test(element))
+          if (dart.notNull(test(element)))
             return element;
           if (length != this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
         if (orElse != null)
           return orElse();
         throw IterableElementError.noElement();
       }
       singleWhere(test) {
         dart.as(test, dart.functionType(core.bool, [E]));
         let length = this.length;
         let match = null;
         let matchFound = false;
         for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
           let element = this.elementAt(i);
-          if (test(element)) {
-            if (matchFound) {
+          if (dart.notNull(test(element))) {
+            if (dart.notNull(matchFound)) {
               throw IterableElementError.tooMany();
             }
             matchFound = true;
             match = element;
           }
           if (length != this.length) {
             throw new core.ConcurrentModificationError(this);
           }
         }
-        if (matchFound)
+        if (dart.notNull(matchFound))
           return match;
         throw IterableElementError.noElement();
       }
       join(separator) {
         if (separator === void 0)
           separator = "";
         let length = this.length;
         if (!dart.notNull(separator[dartx.isEmpty])) {
           if (length == 0)
             return "";
@@ skipping 65 matching lines @@
       take(count) {
         return new (SubListIterable$(E))(this, 0, count);
       }
       takeWhile(test) {
         dart.as(test, dart.functionType(core.bool, [E]));
         return super.takeWhile(test);
       }
       toList(opts) {
         let growable = opts && 'growable' in opts ? opts.growable : true;
         let result = null;
-        if (growable) {
+        if (dart.notNull(growable)) {
           result = core.List$(E).new();
           result.length = this.length;
         } else {
           result = core.List$(E).new(this.length);
         }
         for (let i = 0; dart.notNull(i) < dart.notNull(this.length); i = dart.notNull(i) + 1) {
           result[dartx.set](i, this.elementAt(i));
         }
         return result;
       }
@@ skipping 124 matching lines @@
       }
       toList(opts) {
         let growable = opts && 'growable' in opts ? opts.growable : true;
         let start = this[_start];
         let end = this[_iterable].length;
         if (this[_endOrLength] != null && dart.notNull(this[_endOrLength]) < dart.notNull(end))
           end = this[_endOrLength];
         let length = dart.notNull(end) - dart.notNull(start);
         if (dart.notNull(length) < 0)
           length = 0;
-        let result = growable ? (() => {
+        let result = dart.notNull(growable) ? (() => {
           let _ = core.List$(E).new();
           _.length = length;
           return _;
         })() : core.List$(E).new(length);
         for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
           result[dartx.set](i, this[_iterable][dartx.elementAt](dart.notNull(start) + dart.notNull(i)));
           if (dart.notNull(this[_iterable].length) < dart.notNull(end))
             throw new core.ConcurrentModificationError(this);
         }
         return dart.as(result, core.List$(E));
@@ skipping 114 matching lines @@
   let EfficientLengthMappedIterable = EfficientLengthMappedIterable$();
   let _iterator = dart.JsSymbol('_iterator');
   let MappedIterator$ = dart.generic(function(S, T) {
     class MappedIterator extends core.Iterator$(T) {
       MappedIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_current] = null;
       }
       moveNext() {
-        if (this[_iterator].moveNext()) {
+        if (dart.notNull(this[_iterator].moveNext())) {
           this[_current] = this[_f](this[_iterator].current);
           return true;
         }
         this[_current] = null;
         return false;
       }
       get current() {
         return this[_current];
       }
     }
@@ skipping 50 matching lines @@
     return WhereIterable;
   });
   let WhereIterable = WhereIterable$();
   let WhereIterator$ = dart.generic(function(E) {
     class WhereIterator extends core.Iterator$(E) {
       WhereIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
       }
       moveNext() {
-        while (this[_iterator].moveNext()) {
-          if (this[_f](this[_iterator].current)) {
+        while (dart.notNull(this[_iterator].moveNext())) {
+          if (dart.notNull(this[_f](this[_iterator].current))) {
             return true;
           }
         }
         return false;
       }
       get current() {
         return this[_iterator].current;
       }
     }
     dart.setSignature(WhereIterator, {
@@ skipping 37 matching lines @@
       }
       [_nextExpansion]() {}
       get current() {
         return this[_current];
       }
       moveNext() {
         if (this[_currentExpansion] == null)
           return false;
         while (!dart.notNull(this[_currentExpansion].moveNext())) {
           this[_current] = null;
-          if (this[_iterator].moveNext()) {
+          if (dart.notNull(this[_iterator].moveNext())) {
             this[_currentExpansion] = null;
             this[_currentExpansion] = dart.as(dart.dcall(this[_f], this[_iterator].current)[dartx.iterator], core.Iterator$(T));
           } else {
             return false;
           }
         }
         this[_current] = this[_currentExpansion].current;
         return true;
       }
     }
@@ skipping 107 matching lines @@
   let TakeWhileIterable = TakeWhileIterable$();
   let _isFinished = dart.JsSymbol('_isFinished');
   let TakeWhileIterator$ = dart.generic(function(E) {
     class TakeWhileIterator extends core.Iterator$(E) {
       TakeWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_isFinished] = false;
       }
       moveNext() {
-        if (this[_isFinished])
+        if (dart.notNull(this[_isFinished]))
           return false;
         if (!dart.notNull(this[_iterator].moveNext()) || !dart.notNull(dart.dcall(this[_f], this[_iterator].current))) {
           this[_isFinished] = true;
           return false;
         }
         return true;
       }
       get current() {
-        if (this[_isFinished])
+        if (dart.notNull(this[_isFinished]))
           return null;
         return this[_iterator].current;
       }
     }
     dart.setSignature(TakeWhileIterator, {
       constructors: () => ({TakeWhileIterator: [TakeWhileIterator$(E), [core.Iterator$(E), dart.functionType(core.bool, [E])]]}),
       methods: () => ({moveNext: [core.bool, []]})
     });
     return TakeWhileIterator;
   });
@@ skipping 103 matching lines @@
   let SkipWhileIterator$ = dart.generic(function(E) {
     class SkipWhileIterator extends core.Iterator$(E) {
       SkipWhileIterator(iterator, f) {
         this[_iterator] = iterator;
         this[_f] = f;
         this[_hasSkipped] = false;
       }
       moveNext() {
         if (!dart.notNull(this[_hasSkipped])) {
           this[_hasSkipped] = true;
-          while (this[_iterator].moveNext()) {
+          while (dart.notNull(this[_iterator].moveNext())) {
             if (!dart.notNull(dart.dcall(this[_f], this[_iterator].current)))
               return true;
           }
         }
         return this[_iterator].moveNext();
       }
       get current() {
         return this[_iterator].current;
       }
     }
@@ skipping 100 matching lines @@
       take(count) {
         core.RangeError.checkNotNegative(count, "count");
         return this;
       }
       takeWhile(test) {
         dart.as(test, dart.functionType(core.bool, [E]));
         return this;
       }
       toList(opts) {
         let growable = opts && 'growable' in opts ? opts.growable : true;
-        return growable ? dart.list([], E) : core.List$(E).new(0);
+        return dart.notNull(growable) ? dart.list([], E) : core.List$(E).new(0);
       }
       toSet() {
         return core.Set$(E).new();
       }
     }
     EmptyIterable[dart.implements] = () => [EfficientLength];
     dart.defineExtensionMembers(EmptyIterable, [
       'forEach',
       'elementAt',
       'contains',
@@ skipping 81 matching lines @@
       }
       static forEach(iterable, f) {
         dart.as(f, dart.functionType(dart.void, [dart.bottom]));
         for (let e of iterable) {
           dart.dcall(f, e);
         }
       }
       static any(iterable, f) {
         dart.as(f, dart.functionType(core.bool, [dart.bottom]));
         for (let e of iterable) {
-          if (dart.dcall(f, e))
+          if (dart.notNull(dart.dcall(f, e)))
             return true;
         }
         return false;
       }
       static every(iterable, f) {
         dart.as(f, dart.functionType(core.bool, [dart.bottom]));
         for (let e of iterable) {
           if (!dart.notNull(dart.dcall(f, e)))
             return false;
         }
         return true;
       }
       static reduce(iterable, combine) {
         dart.as(combine, dart.functionType(core.Object, [dart.bottom, dart.bottom]));
         let iterator = iterable[dartx.iterator];
         if (!dart.notNull(iterator.moveNext()))
           throw IterableElementError.noElement();
         let value = iterator.current;
-        while (iterator.moveNext()) {
+        while (dart.notNull(iterator.moveNext())) {
           value = dart.dcall(combine, value, iterator.current);
         }
         return value;
       }
       static fold(iterable, initialValue, combine) {
         dart.as(combine, dart.functionType(core.Object, [dart.bottom, dart.bottom]));
         for (let element of iterable) {
           initialValue = dart.dcall(combine, initialValue, element);
         }
         return initialValue;
@@ skipping 29 matching lines @@
         return it.current;
       }
       static last(iterable) {
         let it = iterable[dartx.iterator];
         if (!dart.notNull(it.moveNext())) {
           throw IterableElementError.noElement();
         }
         let result = null;
         do {
           result = it.current;
-        } while (it.moveNext());
+        } while (dart.notNull(it.moveNext()));
         return result;
       }
       static single(iterable) {
         let it = iterable[dartx.iterator];
         if (!dart.notNull(it.moveNext()))
           throw IterableElementError.noElement();
         let result = it.current;
-        if (it.moveNext())
+        if (dart.notNull(it.moveNext()))
           throw IterableElementError.tooMany();
         return result;
       }
       static firstWhere(iterable, test, orElse) {
         dart.as(test, dart.functionType(core.bool, [dart.bottom]));
         dart.as(orElse, dart.functionType(core.Object, []));
         for (let element of iterable) {
-          if (dart.dcall(test, element))
+          if (dart.notNull(dart.dcall(test, element)))
             return element;
         }
         if (orElse != null)
           return orElse();
         throw IterableElementError.noElement();
       }
       static lastWhere(iterable, test, orElse) {
         dart.as(test, dart.functionType(core.bool, [dart.bottom]));
         dart.as(orElse, dart.functionType(core.Object, []));
         let result = null;
         let foundMatching = false;
         for (let element of iterable) {
-          if (dart.dcall(test, element)) {
+          if (dart.notNull(dart.dcall(test, element))) {
             result = element;
             foundMatching = true;
           }
         }
-        if (foundMatching)
+        if (dart.notNull(foundMatching))
           return result;
         if (orElse != null)
           return orElse();
         throw IterableElementError.noElement();
       }
       static lastWhereList(list, test, orElse) {
         dart.as(test, dart.functionType(core.bool, [dart.bottom]));
         dart.as(orElse, dart.functionType(core.Object, []));
         for (let i = dart.notNull(list.length) - 1; dart.notNull(i) >= 0; i = dart.notNull(i) - 1) {
           let element = list[dartx.get](i);
-          if (dart.dcall(test, element))
+          if (dart.notNull(dart.dcall(test, element)))
             return element;
         }
         if (orElse != null)
           return orElse();
         throw IterableElementError.noElement();
       }
       static singleWhere(iterable, test) {
         dart.as(test, dart.functionType(core.bool, [dart.bottom]));
         let result = null;
         let foundMatching = false;
         for (let element of iterable) {
-          if (dart.dcall(test, element)) {
-            if (foundMatching) {
+          if (dart.notNull(dart.dcall(test, element))) {
+            if (dart.notNull(foundMatching)) {
               throw IterableElementError.tooMany();
             }
             result = element;
             foundMatching = true;
           }
         }
-        if (foundMatching)
+        if (dart.notNull(foundMatching))
           return result;
         throw IterableElementError.noElement();
       }
       static elementAt(iterable, index) {
         if (!(typeof index == 'number'))
           throw new core.ArgumentError.notNull("index");
         core.RangeError.checkNotNegative(index, "index");
         let elementIndex = 0;
         for (let element of iterable) {
           if (index == elementIndex)
             return element;
           elementIndex = dart.notNull(elementIndex) + 1;
         }
         throw core.RangeError.index(index, iterable, "index", null, elementIndex);
       }
       static join(iterable, separator) {
         if (separator === void 0)
           separator = null;
         let buffer = new core.StringBuffer();
         buffer.writeAll(iterable, separator);
         return dart.toString(buffer);
       }
       static joinList(list, separator) {
         if (separator === void 0)
           separator = null;
-        if (list[dartx.isEmpty])
+        if (dart.notNull(list[dartx.isEmpty]))
           return "";
         if (list.length == 1)
           return `${list[dartx.get](0)}`;
         let buffer = new core.StringBuffer();
-        if (separator[dartx.isEmpty]) {
+        if (dart.notNull(separator[dartx.isEmpty])) {
           for (let i = 0; dart.notNull(i) < dart.notNull(list.length); i = dart.notNull(i) + 1) {
             buffer.write(list[dartx.get](i));
           }
         } else {
           buffer.write(list[dartx.get](0));
           for (let i = 1; dart.notNull(i) < dart.notNull(list.length); i = dart.notNull(i) + 1) {
             buffer.write(separator);
             buffer.write(list[dartx.get](i));
           }
         }
@@ skipping 157 matching lines @@
         let smaller = null;
         let larger = null;
         if (dart.notNull(set.length) < dart.notNull(other.length)) {
           smaller = set;
           larger = other;
         } else {
           smaller = other;
           larger = set;
         }
         for (let element of smaller) {
-          if (larger.contains(element)) {
+          if (dart.notNull(larger.contains(element))) {
             result.add(element);
           }
         }
         return result;
       }
       static setUnion(set, other, result) {
         result.addAll(set);
         result.addAll(other);
         return result;
       }
@@ skipping 321 matching lines @@
     constructors: () => ({_ListIndicesIterable: [_ListIndicesIterable, [core.List]]}),
     methods: () => ({elementAt: [core.int, [core.int]]})
   });
   let _values = dart.JsSymbol('_values');
   let ListMapView$ = dart.generic(function(E) {
     class ListMapView extends core.Object {
       ListMapView(values) {
         this[_values] = values;
       }
       get(key) {
-        return this.containsKey(key) ? this[_values][dartx.get](dart.as(key, core.int)) : null;
+        return dart.notNull(this.containsKey(key)) ? this[_values][dartx.get](dart.as(key, core.int)) : null;
       }
       get length() {
         return this[_values].length;
       }
       get values() {
         return new (SubListIterable$(E))(this[_values], 0, null);
       }
       get keys() {
         return new _ListIndicesIterable(this[_values]);
       }
@@ skipping 132 matching lines @@
         for (let i = dart.notNull(srcStart) + dart.notNull(count) - 1, j = dart.notNull(dstStart) + dart.notNull(count) - 1; dart.notNull(i) >= dart.notNull(srcStart); i = dart.notNull(i) - 1, j = dart.notNull(j) - 1) {
           dst[dartx.set](j, src[dartx.get](i));
         }
       } else {
         for (let i = srcStart, j = dstStart; dart.notNull(i) < dart.notNull(srcStart) + dart.notNull(count); i = dart.notNull(i) + 1, j = dart.notNull(j) + 1) {
           dst[dartx.set](j, src[dartx.get](i));
         }
       }
     }
     static areEqual(a, b) {
-      if (core.identical(a, b))
+      if (dart.notNull(core.identical(a, b)))
         return true;
       if (!dart.is(b, core.List))
         return false;
       let length = a.length;
       if (!dart.equals(length, dart.dload(b, 'length')))
         return false;
       for (let i = 0; dart.notNull(i) < dart.notNull(length); i = dart.notNull(i) + 1) {
         if (!dart.notNull(core.identical(a[dartx.get](i), dart.dindex(b, i))))
           return false;
       }
@@ skipping 144 matching lines @@
       let pivot1 = el2;
       let pivot2 = el4;
       a[dartx.set](index1, el1);
       a[dartx.set](index3, el3);
       a[dartx.set](index5, el5);
       a[dartx.set](index2, a[dartx.get](left));
       a[dartx.set](index4, a[dartx.get](right));
       let less = dart.notNull(left) + 1;
       let great = dart.notNull(right) - 1;
       let pivots_are_equal = dart.dcall(compare, pivot1, pivot2) == 0;
-      if (pivots_are_equal) {
+      if (dart.notNull(pivots_are_equal)) {
         let pivot = pivot1;
         for (let k = less; dart.notNull(k) <= dart.notNull(great); k = dart.notNull(k) + 1) {
           let ak = a[dartx.get](k);
           let comp = dart.dcall(compare, ak, pivot);
           if (comp == 0)
             continue;
           if (dart.notNull(comp) < 0) {
             if (k != less) {
               a[dartx.set](k, a[dartx.get](less));
               a[dartx.set](less, ak);
@@ skipping 78 matching lines @@
             }
           }
         }
       }
       a[dartx.set](left, a[dartx.get](dart.notNull(less) - 1));
       a[dartx.set](dart.notNull(less) - 1, pivot1);
       a[dartx.set](right, a[dartx.get](dart.notNull(great) + 1));
       a[dartx.set](dart.notNull(great) + 1, pivot2);
       Sort._doSort(a, left, dart.notNull(less) - 2, compare);
       Sort._doSort(a, dart.notNull(great) + 2, right, compare);
-      if (pivots_are_equal) {
+      if (dart.notNull(pivots_are_equal)) {
         return;
       }
       if (dart.notNull(less) < dart.notNull(index1) && dart.notNull(great) > dart.notNull(index5)) {
         while (dart.dcall(compare, a[dartx.get](less), pivot1) == 0) {
           less = dart.notNull(less) + 1;
         }
         while (dart.dcall(compare, a[dartx.get](great), pivot2) == 0) {
           great = dart.notNull(great) - 1;
         }
         for (let k = less; dart.notNull(k) <= dart.notNull(great); k = dart.notNull(k) + 1) {
@@ skipping 80 matching lines @@
     }
     toString() {
       return `Symbol("${this[_name]}")`;
     }
     static getName(symbol) {
       return symbol[_name];
     }
     static validatePublicSymbol(name) {
       if (dart.notNull(name[dartx.isEmpty]) || dart.notNull(Symbol.publicSymbolPattern.hasMatch(name)))
         return name;
-      if (name[dartx.startsWith]('_')) {
+      if (dart.notNull(name[dartx.startsWith]('_'))) {
         throw new core.ArgumentError(`"${name}" is a private identifier`);
       }
       throw new core.ArgumentError(`"${name}" is not a valid (qualified) symbol name`);
     }
     static isValidSymbol(name) {
       return dart.notNull(name[dartx.isEmpty]) || dart.notNull(Symbol.symbolPattern.hasMatch(name));
     }
   }
   Symbol[dart.implements] = () => [core.Symbol];
   dart.defineNamedConstructor(Symbol, 'unvalidated');
@@ skipping 92 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;
 })(_internal, core, collection, math, _interceptors, _js_primitives);