hrsakai opened a new pull request #163:
URL: https://github.com/apache/pulsar-client-node/pull/163
In our enviroment, sometimes we get following error.
```
#
# Fatal error in , line 0
# Check failed: result.second.
#
#
#
#FailureMessage Object: 0x7ffe7bd5eda0
1: 0xa92851 [node]
2: 0x1a1ac64 V8_Fatal(char const*, ...) [node]
3: 0xe7e119
v8::internal::GlobalBackingStoreRegistry::Register(std::shared_ptr<v8::internal::BackingStore>)
[node]
4: 0xbc7e48 v8::ArrayBuffer::GetBackingStore() [node]
5: 0x9e3a80 napi_get_typedarray_info [node]
6: 0x7f815dd9f669 Message::GetData(Napi::CallbackInfo const&)
[/root/pulsar-client-node/build/Release/Pulsar.node]
7: 0x7f815dda3aa1
Napi::ObjectWrap<Message>::InstanceMethodCallbackWrapper(napi_env__*,
napi_callback_info__*) [/root/pulsar-client-node/build/Release/Pulsar.node]
8: 0x9da63f [node]
9: 0xc06acb [node]
10: 0xc08076 [node]
11: 0xc086f6 v8::internal::Builtin_HandleApiCall(int, unsigned long*,
v8::internal::Isolate*) [node]
12: 0x1427159 [node]
Illegal instruction (core dumped)
```
## Modification
I use `Napi::Buffer<T>::Copy` instead of `Napi::Buffer<T>::New`.
## Steps to reproduce
One easy way to reproduce is to call `msg::getData()` twice.
```
const msg = await consumer.receive();
console.log(msg.getData().toString());
console.log(msg.getData().toString());
```
<br>
This issue occures on node 14 or above.
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