panic: runtime error: invalid memory address or nil pointer

[kukeer]

[root@VM-8-6-opencloudos lighthouse]# brook server -l :9999 -p hello &
[4] 91808
[root@VM-8-6-opencloudos lighthouse]# panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xd92896]

goroutine 5 [running]:
github.com/txthinking/runnergroup.(*RunnerGroup).Done(...)
github.com/txthinking/runnergroup@v0.0.0-20241229123329-7b873ad00768/runnergroup.go:109
golang.txthinking.com/brook.(*Server).Shutdown(...)
golang.txthinking.com/brook/server.go:145
main.main.func4.3()
golang.txthinking.com/brook/cli/brook/main.go:266 +0x16
github.com/txthinking/runnergroup.(*RunnerGroup).Wait.func1.1(0x0, 0x0?)
github.com/txthinking/runnergroup@v0.0.0-20241229123329-7b873ad00768/runnergroup.go:49 +0x59
created by github.com/txthinking/runnergroup.(*RunnerGroup).Wait.func1 in goroutine 22
github.com/txthinking/runnergroup@v0.0.0-20241229123329-7b873ad00768/runnergroup.go:47 +0x5e

[txthinking]

This is usually because the port is occupied or the value of a parameter is incorrect.

It should not panic, but print the error reason. It will be fixed in the next version.