A Bug found when execute " hset " command.

[openinx]

127.0.0.1:6389> hset test  good boy 
Could not connect to Redis at 127.0.0.1:6389: Connection refused

there some traceback logs from server-side:

panic: runtime error: assignment to entry in nil map

goroutine 20 [running]:
runtime.panic(0x544d00, 0x631cf3)
        /usr/local/go/src/pkg/runtime/panic.c:279 +0xf5
redis.(*DefaultHandler).Hset(0xc208040140, 0xc2080004c8, 0x7, 0xc208000540, 0x4, 0xc208063200, 0x3, 0x600, 0x0, 0x0, ...)
        /home/openinx/software/go-redis-server-master/src/redis/defaultHandler.go:245 +0x6c3
reflect.Value.call(0x536240, 0x551d78, 0x0, 0x130, 0x55def0, 0x4, 0xc208046080, 0x4, 0x4, 0x0, ...)
        /usr/local/go/src/pkg/reflect/value.go:563 +0x1210
reflect.Value.Call(0x536240, 0x551d78, 0x0, 0x130, 0xc208046080, 0x4, 0x4, 0x0, 0x0, 0x0)
        /usr/local/go/src/pkg/reflect/value.go:411 +0xd7
redis.func·001(0xc208018280, 0x0, 0x0, 0x0, 0x0)
        /home/openinx/software/go-redis-server-master/src/redis/auto.go:94 +0xdbd
redis.(*Server).Apply(0xc20804a140, 0xc208018280, 0x0, 0x0, 0x0, 0x0)
        /home/openinx/software/go-redis-server-master/src/redis/handler.go:39 +0x13d
redis.(*Server).ServeClient(0xc20804a140, 0x7fcf810fd518, 0xc20803a1b8, 0x0, 0x0)
        /home/openinx/software/go-redis-server-master/src/redis/server.go:98 +0x323
created by redis.(*Server).Serve
        /home/openinx/software/go-redis-server-master/src/redis/server.go:50 +0x12f

goroutine 16 [IO wait]:
net.runtime_pollWait(0x7fcf810fd468, 0x72, 0x0)
        /usr/local/go/src/pkg/runtime/netpoll.goc:146 +0x66
net.(*pollDesc).Wait(0xc20802a140, 0x72, 0x0, 0x0)
        /usr/local/go/src/pkg/net/fd_poll_runtime.go:84 +0x46
net.(*pollDesc).WaitRead(0xc20802a140, 0x0, 0x0)
        /usr/local/go/src/pkg/net/fd_poll_runtime.go:89 +0x42
net.(*netFD).accept(0xc20802a0e0, 0x5a5908, 0x0, 0x7fcf810fc2b8, 0xb)
        /usr/local/go/src/pkg/net/fd_unix.go:409 +0x343
net.(*TCPListener).AcceptTCP(0xc20803a1b0, 0x28, 0x0, 0x0)
        /usr/local/go/src/pkg/net/tcpsock_posix.go:234 +0x5d
net.(*TCPListener).Accept(0xc20803a1b0, 0x0, 0x0, 0x0, 0x0)
        /usr/local/go/src/pkg/net/tcpsock_posix.go:244 +0x4b
redis.(*Server).Serve(0xc20804a140, 0x7fcf810fc498, 0xc20803a1b0, 0x0, 0x0)
        /home/openinx/software/go-redis-server-master/src/redis/server.go:46 +0xc6
redis.(*Server).ListenAndServe(0xc20804a140, 0x0, 0x0)
        /home/openinx/software/go-redis-server-master/src/redis/server.go:36 +0x190
main.main()
        /home/openinx/software/go-redis-server-master/src/main/main.go:12 +0x7b

goroutine 19 [finalizer wait]:
runtime.park(0x412eb0, 0x635818, 0x634389)
        /usr/local/go/src/pkg/runtime/proc.c:1369 +0x89
runtime.parkunlock(0x635818, 0x634389)
        /usr/local/go/src/pkg/runtime/proc.c:1385 +0x3b
runfinq()
        /usr/local/go/src/pkg/runtime/mgc0.c:2644 +0xcf
runtime.goexit()
        /usr/local/go/src/pkg/runtime/proc.c:1445

goroutine 21 [runnable]:
redis.func·013()
        /home/openinx/software/go-redis-server-master/src/redis/server.go:68
created by redis.(*Server).ServeClient
        /home/openinx/software/go-redis-server-master/src/redis/server.go:76 +0x140

After review the code, I found a bug from file defaultHandler.go.

func NewDatabase(parent *Database) *Database {
    db := &Database{
        values:   make(HashValue),
        sub:      make(HashSub),
        brstack:  make(HashBrStack),
        children: map[int]*Database{},
        parent:   parent,
    }
    db.children[0] = db
    return db
}

I think you just forget make a map for hvalues :

func NewDatabase(parent *Database) *Database {
    db := &Database{
        values:   make(HashValue),
        hvalues:  make(HashHash),
        sub:      make(HashSub),
        brstack:  make(HashBrStack),
        children: map[int]*Database{},
        parent:   parent,
    }
    db.children[0] = db
    return db
}

[ykumar-rb]

Even I have faced similar issue. Thanks @openinx , the fix works perfectly ok. Can you check if you can contribute to this project. This fix should go to master branch.