出现fatal error: concurrent map read and map write。

goroutine 5677 [running]: github.com/imroc/req/v3.parseRequestHeader(0xc000626dc0, 0xc000a44000) /root/go/pkg/mod/github.com/imroc/req/v3@v3.48.0/middleware.go:537 +0x391 github.com/imroc/req/v3.(*Request).do(0xc000a44000) /root/go/pkg/mod/github.com/imroc/req/v3@v3.48.0/request.go:660 +0xac7 github.com/imroc/req/v3.(*Request).Do(0xc000a44000, {0x0, 0x0, 0xc000e067b0?}) /root/go/pkg/mod/github.com/imroc/req/v3@v3.48.0/request.go:636 +0x38f github.com/imroc/req/v3.(*Request).Send(0xc000a44000, {0xec2aad, 0x3}, {0xc000042540, 0x3c}) /root/go/pkg/mod/github.com/imroc/req/v3@v3.48.0/request.go:726 +0xfb github.com/imroc/req/v3.(*Request).Get(...) /root/go/pkg/mod/github.com/imroc/req/v3@v3.48.0/request.go:745 main.(*config).request.func4({0xc000042540, 0x3c}, 0x3, 0xc000590200) /opt/go-project/net_check/test2.go:529 +0x185 created by main.(*config).request in goroutine 5653 /opt/go-project/net_check/test2.go:527 +0x1265
请问这个问题要如何处理？

Start at middleware.go:537, using the reported concurrent goroutine path as the entry point, and inspect how request headers are accessed. Reproduce the failure with the concurrent request pattern shown at test2.go:527-529; completion should include a project test or documented handling that prevents the reported concurrent-map panic.