使用Context传入req.Do 会导致debug模式内存出错

[locxiang]

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x45d9f48]

goroutine 124 [running]:
github.com/imroc/req.(*Resp).dumpReqHead(0xc00024a580, 0xc00058b3e8)
	/Users/xh/go/pkg/mod/github.com/imroc/req@v0.2.3/dump.go:117 +0x128
github.com/imroc/req.(*Resp).dumpRequest(0xc00024a580, 0xc00058b3e8)
	/Users/xh/go/pkg/mod/github.com/imroc/req@v0.2.3/dump.go:103 +0x18f
github.com/imroc/req.(*Resp).Dump(0xc00024a580, 0x4d92d16, 0x10)
	/Users/xh/go/pkg/mod/github.com/imroc/req@v0.2.3/dump.go:206 +0xc8
github.com/imroc/req.(*Req).Do(0xc0001889a0, 0x4d89712, 0x4, 0xc0000d0000, 0x44, 0xc0005edc48, 0x4, 0x4, 0xc0005edaa8, 0x403ea3b, ...)
	/Users/xh/go/pkg/mod/github.com/imroc/req@v0.2.3/req.go:355 +0xafe
github.com/imroc/req.(*Req).Post(...)
	/Users/xh/go/pkg/mod/github.com/imroc/req@v0.2.3/req.go:621
......

调用代码

post, err := r.Post(domain, header, req.FileUpload{
		File:      file,
		FileName:  filename,
		FieldName: "file",
	}, req.UploadProgress(progress),ctx)
	if err != nil {
		return nil, err
	}

跟踪内存发现，已经释放了r.req, 但是debug模式还在调用r.req.URL,
改成非debug模式或者关闭ctx就无问题

[imroc]

多谢反馈，已修复：b713f87

[imroc]

打上了最新 tag v0.2.4