[Bug] Data races between initDecoder and initEncoder operations

[sunadoi]

In v0.10.4, A data race condition has been detected when running tests with -race flag.

I suspect the following is occurring from this PR (#490 ):

• runtime.AnalyzeTypeAddr() is being called in both initDecoder and initEncoder.
• Although using sync.Once, since initEncoderOnce and initDecoderOnce are separate variables, concurrent calls to initEncoder and initDecoder result in race conditions in runtime.AnalyzeTypeAddr() operations.

In our project, tests that simultaneously use json.Marshal and json.Unmarshal have become flaky.

[vincentserpoul]

I also have the same issue

[lrweck]

same

[goccy]

@toddtreece It seems that your PR caused a regression. I'm currently unable to allocate time to address this, so could you please handle it ?

[toddtreece]

@goccy yes, sorry about missing that. i will open a PR to address it tomorrow morning