Add regression test for #5111.
Add regression test for #5111.

spinlock/redis,neomantra/redis,pmem/redis,spinlock/redis,antirez/redis,ctripcorp/redis,soveran/redis,GitHubMota/redis,antirez/redis,soveran/redis,soloestoy/redis,PKRoma/redis,yossigo/redis,soloestoy/redis,ofirluzon/redis,PKRoma/redis,antirez/redis,ctripcorp/redis,charsyam/redis,soloestoy/redis,ctripcorp/redis,soloestoy/redis,charsyam/redis,soveran/redis,ofirluzon/redis,neomantra/redis,nnog/redis,spinlock/redis,neomantra/redis,yossigo/redis,yossigo/redis,ctripcorp/redis,oranagra/redis,GitHubMota/redis,nnog/redis,yossigo/redis,PKRoma/redis,spinlock/redis,antirez/redis,charsyam/redis,charsyam/redis,ofirluzon/redis,charsyam/redis,ofirluzon/redis,oranagra/redis,PKRoma/redis,pmem/redis,soveran/redis,nnog/redis,GitHubMota/redis,PKRoma/redis,ofirluzon/redis,oranagra/redis,pmem/redis,pmem/redis,oranagra/redis,GitHubMota/redis,soloestoy/redis,neomantra/redis,oranagra/redis,nnog/redis,neomantra/redis,yossigo/redis