Go defer：闭包读取的是哪个时刻的 x？

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          package main
        
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          import "fmt"
        
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          func demo() {
        
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              x := 1
        
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              defer fmt.Println("argument", x)
        
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              defer func() {
        
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                  fmt.Println("closure", x)
        
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              }()
        
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              x = 2
        
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              return
        
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          }
        
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          func main() {
        
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              demo()
        
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          }