[go-nuts] Is the following funciton always safe to convert a string to a slice?

[T L]

func String2ByteSlice(str string) (bs []byte) {
    strHdr := (*reflect.StringHeader)(unsafe.Pointer(&str))
    sliceHdr := (*reflect.SliceHeader)(unsafe.Pointer(&bs))
    
    // Is it possible that the str value is allocated on stack
    // and the stack grows at this moment, so the address value
    // stored in strHdr.Data will become obsoleted?
    
    sliceHdr.Data = strHdr.Data
    sliceHdr.Len = strHdr.Len
    sliceHdr.Cap = strHdr.Len
    
    runtime.KeepAlive(&str)
    
    return
}

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