error, unexpected end of JSON input

[crazyworld]

when i using gpt-4 model, occur error: error, unexpected end of JSON input

[vvatanabe]

@crazyworld Please follow the template below and give us the details of your problem.

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**Environment (please complete the following information):**
 - go-openai version: [e.g. v1.12.0]
 - Go version: [e.g. 1.18]
 - OpenAI API version: [e.g. v1]
 - OS: [e.g. Ubuntu 20.04]

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[vvatanabe]

@crazyworld Looking at the commit history, it appears that several fixes have been committed. I believe the issue has been resolved, so please try with the latest version.

• https://github.com/sashabaranov/go-openai/commits/master/error.go
• https://github.com/sashabaranov/go-openai/blame/master/client.go#L211-L227