WARNING: Visual Leak Detector detected memory leaks!

Hello everyone, I want to know run multiple js files, there will be having memory leak? My game data is stored using js like monster attributes and skills information.
The second question I use vld tool check js project memory leak found a lot of problems, this is bug? Create a js-based project also had these problems

`WARNING: Visual Leak Detector detected memory leaks!
---------- Block 21 at 0x00B4D078: 20 bytes ----------
Call Stack:
g:\cocos2d-x\cocos2d-x-2.2.0\scripting\javascript\bindings\scriptingcore.cpp (352): HelloJs2.exe!ScriptingCore::ScriptingCore + 0x7 bytes
g:\cocos2d-x\cocos2d-x-2.2.0\scripting\javascript\bindings\scriptingcore.h (51): HelloJs2.exe!ScriptingCore::getInstance + 0x2B bytes
g:\cocos2d-x\cocos2d-x-2.2.0\projects\hellojs2\classes\appdelegate.cpp (41): HelloJs2.exe!AppDelegate::applicationDidFinishLaunching + 0x5 bytes
g:\cocos2d-x\cocos2d-x-2.2.0\cocos2dx\platform\win32\ccapplication.cpp (47): libcocos2d.dll!cocos2d::CCApplication::run + 0xF bytes
g:\cocos2d-x\cocos2d-x-2.2.0\projects\hellojs2\proj.win32\main.cpp (31): HelloJs2.exe!wWinMain + 0x2A bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (547): HelloJs2.exe!__tmainCRTStartup + 0x2C bytes
f:\dd\vctools\crt_bld\self_x86\crt\src\crtexe.c (371): HelloJs2.exe!wWinMainCRTStartup
0x767A1174 (File and line number not available): kernel32.dll!BaseThreadInitThunk + 0x12 bytes
0x7761B3F5 (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0x63 bytes
0x7761B3C8 (File and line number not available): ntdll.dll!RtlInitializeExceptionChain + 0x36 bytes
Data:
20 38 5B 01 35 00 00 00 00 00 00 00 01 00 00 00 .8[.5… …
00 00 00 00 … …

---------- Block 487 at 0x0616AC08: 220 bytes ----------
Call Stack:
g:\cocos2d-x\cocos2d-x-2.2.0\scripting\javascript\bindings\js_bindings_chipmunk_manual.cpp (1508): HelloJs2.exe!JSB_cpBase_createClass + 0xF bytes`

Visual Leak Detector detected 21 memory leaks (5176 bytes).
Largest number used: 107977 bytes.
Total allocations: 113888 bytes.
Visual Leak Detector is now exiting.