gorountine 错误 这个是什么情况下引起的 直接导致程序退出 是什么问题

``` goroutine 73061 [IO wait, 1 minutes]: net.runtime_pollWait(0x334beb28, 0x72, 0x14ffce68) D:/Go/src/runtime/netpoll.go:160 +0x55 net.(pollDesc).Wait(0x14f64370, 0x72, 0x0, 0x0) D:/Go/src/net/fd_poll_runtime.go:73 +0x35 net.(ioSrv).ExecIO(0x11a136e8, 0x14f642d8, 0x9c78d0, 0x7, 0xadf680, 0xf90, 0 0x0) D:/Go/src/net/fd_windows.go:183 +0x122 net.(netFD).Read(0x14f642a0, 0x13834000, 0x1000, 0x1000, 0x0, 0x0, 0x0) D:/Go/src/net/fd_windows.go:482 +0x129 net.(conn).Read(0x14d30da8, 0x13834000, 0x1000, 0x1000, 0x0, 0x0, 0x0) D:/Go/src/net/net.go:172 +0xb9 net/http.(connReader).Read(0x141863a0, 0x13834000, 0x1000, 0x1000, 0x0, 0x0, 0) D:/Go/src/net/http/server.go:526 +0x189 bufio.(Reader).fill(0x13d7c600) D:/Go/src/bufio/bufio.go:97 +0x172 bufio.(Reader).ReadSlice(0x13d7c600, 0xa, 0x0, 0x0, 0x0, 0x0, 0x0) D:/Go/src/bufio/bufio.go:328 +0x1b4 bufio.(Reader).ReadLine(0x13d7c600, 0x0, 0x0, 0x0, 0x9a6a00, 0x0, 0x0) D:/Go/src/bufio/bufio.go:357 +0x4b net/textproto.(Reader).readLineSlice(0x129359e0, 0x0, 0x0, 0x0, 0x0, 0x0) D:/Go/src/net/textproto/reader.go:55 +0x59 net/textproto.(Reader).ReadLine(0x129359e0, 0x0, 0x0, 0x0, 0x0) D:/Go/src/net/textproto/reader.go:36 +0x39 net/http.readRequest(0x13d7c600, 0x0, 0x146fbab0, 0x0, 0x0) D:/Go/src/net/http/request.go:721 +0x9a net/http.(conn).readRequest(0x11e4ff00, 0x0, 0x0, 0x0) D:/Go/src/net/http/server.go:705 +0x3b7 net/http.(conn).serve(0x11e4ff00) D:/Go/src/net/http/server.go:1425 +0x985 created by net/http.(*Server).Serve D:/Go/src/net/http/server.go:2137 +0x394 ```