fixed some consistency bugs. new method seems to work well, it still has problems though

gulpfile.js

@@ -87,7 +87,7 @@ var files = {
   src: polyfills.concat(concatOrder.map(function (f) {
     return 'src/' + f
   })),
-  test: ['Helper.spec.js'].concat(concatOrder.map(function (f) {
+  test: ['build/Helper.spec.js'].concat(concatOrder.map(function (f) {
     return 'build/' + f
   }).concat(['build/**/*.spec.js']))
 }

src/OperationStore.js

@@ -167,6 +167,11 @@ class AbstractTransaction {
   }
   * garbageCollectOperation (id) {
     var o = yield* this.getOperation(id)
+
+    if (o == null) {
+      return
+    }
+
     if (!o.deleted) {
       yield* this.deleteOperation(id)
       o = yield* this.getOperation(id)
@@ -422,7 +427,7 @@ class AbstractOperationStore {
     } else {
       while (op != null) {
         var state = yield* this.getState(op.id[0])
-        if (op.id[1] === state.clock || (op.id[1] < state.clock && (yield* this.getOperation(op.id)) == null)) {
+        if (op.id[1] === state.clock) {
           // either its a new operation (1. case), or it is an operation that was deleted, but is not yet in the OS
           if (op.id[1] === state.clock) {
             state.clock++

src/OperationStores/Memory.js

@@ -110,7 +110,7 @@ Y.Memory = (function () {
     }
     * checkDeleteStoreForState (state) {
       var n = this.ds.findNodeWithUpperBound([state.user, state.clock])
-      if (n !== null && n.val.id[0] === state.user) {
+      if (n !== null && n.val.id[0] === state.user && n.val.gc) {
         state.clock = Math.max(state.clock, n.val.id[1] + n.val.len)
       }
     }

src/Types/Array.spec.js

@@ -1,7 +1,7 @@
 /* global createUsers, wait, Y, compareAllUsers, getRandomNumber, applyRandomTransactions, async, garbageCollectAllUsers, describeManyTimes */
 /* eslint-env browser,jasmine */
 
-var numberOfYArrayTests = 50
+var numberOfYArrayTests = 10
 var repeatArrayTests = 300
 
 describe('Array Type', function () {