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Update chapter_3_12.md
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@@ -11,8 +11,11 @@ fn main() {
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}
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```
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运行该程序会打印如下错误:
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运行时添加```RUST_BACKTRACE=1```,可以打印完整的堆栈,上面的代码运行时加```RUST_BACKTRACE=1```的结果如下:
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## 3.12.2 用Result处理可恢复错误
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