diff --git a/WKC/WebKit/WKC/webkit/WKCVersion.h b/WKC/WebKit/WKC/webkit/WKCVersion.h
index 5d5631a86..73447974a 100755
--- a/WKC/WebKit/WKC/webkit/WKCVersion.h
+++ b/WKC/WebKit/WKC/webkit/WKCVersion.h
@@ -29,7 +29,7 @@
 #define WKC_VERSION_CHECK(major, minor, micro) \
     (((major)*10000) + ((minor)*100) + (micro)) >= ((WKC_VERSION_MAJOR*10000) + (WKC_VERSION_MINOR*100) + (WKC_VERSION_MICRO))
 
-#define WKC_CUSTOMER_RELEASE_VERSION "0.6.9"
+#define WKC_CUSTOMER_RELEASE_VERSION "0.6.10"
 
 #define WKC_WEBKIT_VERSION "601.6"
 
diff --git a/webkit/JavaScriptCore/runtime/JSArray.cpp b/webkit/JavaScriptCore/runtime/JSArray.cpp
index 168d3648e..f5d0e13e0 100755
--- a/webkit/JavaScriptCore/runtime/JSArray.cpp
+++ b/webkit/JavaScriptCore/runtime/JSArray.cpp
@@ -688,7 +688,12 @@ JSArray* JSArray::fastSlice(ExecState& exec, unsigned startIndex, unsigned count
         if (count >= MIN_SPARSE_ARRAY_INDEX || structure(vm)->holesMustForwardToPrototype(vm))
             return nullptr;
 
-        Structure* resultStructure = exec.lexicalGlobalObject()->arrayStructureForIndexingTypeDuringAllocation(arrayType);
+        JSGlobalObject* lexicalGlobalObject = exec.lexicalGlobalObject();
+        Structure* resultStructure = lexicalGlobalObject->arrayStructureForIndexingTypeDuringAllocation(arrayType);
+        if (UNLIKELY(hasAnyArrayStorage(resultStructure->indexingType())))
+            return nullptr;
+
+        ASSERT(!lexicalGlobalObject->isHavingABadTime());
         JSArray* resultArray = JSArray::tryCreateUninitialized(vm, resultStructure, count);
         if (!resultArray)
             return nullptr;
@@ -718,7 +723,12 @@ EncodedJSValue JSArray::fastConcatWith(ExecState& exec, JSArray& otherArray)
     unsigned otherArraySize = otherArray.m_butterfly->publicLength();
     ASSERT(thisArraySize + otherArraySize < MIN_SPARSE_ARRAY_INDEX);
 
-    Structure* resultStructure = exec.lexicalGlobalObject()->arrayStructureForIndexingTypeDuringAllocation(newArrayType);
+    JSGlobalObject* lexicalGlobalObject = exec.lexicalGlobalObject();
+    Structure* resultStructure = lexicalGlobalObject->arrayStructureForIndexingTypeDuringAllocation(newArrayType);
+    if (UNLIKELY(hasAnyArrayStorage(resultStructure->indexingType())))
+        return JSValue::encode(throwOutOfMemoryError(&exec));
+
+    ASSERT(!lexicalGlobalObject->isHavingABadTime());
     JSArray* resultArray = JSArray::tryCreateUninitialized(vm, resultStructure, thisArraySize + otherArraySize);
     if (!resultArray)
         return JSValue::encode(throwOutOfMemoryError(&exec));