[Bug] safeline-chaos fails update with the following issue server.go:83

What happened?

panic: runtime error: invalid memory address or nil pointer dereference
goroutine ... running:
git.in.chaitin.net/safeline-ce/challenge/server.(*APIServer).Shutdown(0xc000... )
/app/server/server.go:83 +0xdb
main.gracefulShutdown(...)

How we reproduce?

1. ...attempt container update this error is produced each time
2. ...
3. ...

Expected behavior

No response

Error log

panic: runtime error: invalid memory address or nil pointer dereference
goroutine ... running:
git.in.chaitin.net/safeline-ce/challenge/server.(*APIServer).Shutdown(0xc000... )
/app/server/server.go:83 +0xdb
main.gracefulShutdown(...)

Thank you for reporting this issue. We are currently investigating the root cause and whether it affects the update process. We will share any progress in this issue once we have more information.

Fix expected in version 9.4.1