panic invalid memory address or nil pointer dereference

[randoms]

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x18 pc=0x4ffcac]

goroutine 234510 [running]:
bufio.(*Writer).Flush(0xc000287340, 0xc0005dd96c, 0x115)
	/opt/hostedtoolcache/go/1.13.10/x64/src/bufio/bufio.go:593 +0x5c
bufio.(*Writer).Write(0xc000287340, 0xc0005dd96c, 0x51d, 0x6d694, 0xb, 0x0, 0x0)
	/opt/hostedtoolcache/go/1.13.10/x64/src/bufio/bufio.go:629 +0xe4
net/http.(*response).write(0xc000190380, 0x51d, 0xc0005dd96c, 0x51d, 0x6d694, 0x0, 0x0, 0xb, 0x0, 0x0)
	/opt/hostedtoolcache/go/1.13.10/x64/src/net/http/server.go:1572 +0x29a
net/http.(*response).Write(0xc000190380, 0xc0005dd96c, 0x51d, 0x6d694, 0xb, 0x0, 0x0)
	/opt/hostedtoolcache/go/1.13.10/x64/src/net/http/server.go:1541 +0x56
livego/protocol/httpflv.(*FLVWriter).SendPacket(0xc0001620c0, 0xaba7f8, 0xc000177970)
	/home/runner/work/livego/livego/protocol/httpflv/writer.go:144 +0x191
livego/protocol/httpflv.NewFLVWriter.func1(0xc0001620c0)
	/home/runner/work/livego/livego/protocol/httpflv/writer.go:49 +0x2f
created by livego/protocol/httpflv.NewFLVWriter
	/home/runner/work/livego/livego/protocol/httpflv/writer.go:48 +0x35e

Crashed after running for about an hour.