if raceenabled && h != nil {
		callerpc := getcallerpc()
		pc := abi.FuncPCABIInternal(mapaccess1)
		racereadpc(unsafe.Pointer(h), callerpc, pc)
		raceReadObjectPC(t.Key, key, callerpc, pc)
	}
	if msanenabled && h != nil {
		msanread(key, t.Key.Size_)
	}
	if asanenabled && h != nil {
		asanread(key, t.Key.Size_)
	}
	if h == nil || h.count == 0 {