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| -rw-r--r-- | src/doc/trpl/references-and-borrowing.md | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/doc/trpl/references-and-borrowing.md b/src/doc/trpl/references-and-borrowing.md index b27db2ab7be..d1d3063138e 100644 --- a/src/doc/trpl/references-and-borrowing.md +++ b/src/doc/trpl/references-and-borrowing.md @@ -336,7 +336,9 @@ In other words, `y` is only valid for the scope where `x` exists. As soon as the borrow ‘doesn’t live long enough’ because it’s not valid for the right amount of time. -The same problem occurs when the reference is declared _before_ the variable it refers to: +The same problem occurs when the reference is declared _before_ the variable it +refers to. This is because resources within the same scope are freed in the +opposite order they were declared: ```rust,ignore let y: &i32; @@ -369,3 +371,6 @@ statement 1 at 3:14 println!("{}", y); } ``` + +In the above example, `y` is declared before `x`, meaning that `y` lives longer +than `x`, which is not allowed. |