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trpl: Use ordered list to release user from counting

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Later in text we mention 'step four' and 'step three'. This fix releases user
from counting.
This commit is contained in:
Boris Egorov 2015-10-07 22:44:17 +06:00
parent c056cbbe05
commit 2ba0c48b79
1 changed files with 4 additions and 4 deletions
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8
src/doc/trpl/lifetimes.md
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@ -43,11 +43,11 @@ With that in mind, let’s learn about lifetimes.
Lending out a reference to a resource that someone else owns can be
complicated. For example, imagine this set of operations:
- I acquire a handle to some kind of resource.
- I lend you a reference to the resource.
- I decide I’m done with the resource, and deallocate it, while you still have
1. I acquire a handle to some kind of resource.
2. I lend you a reference to the resource.
3. I decide I’m done with the resource, and deallocate it, while you still have
your reference.
- You decide to use the resource.
4. You decide to use the resource.
Uh oh! Your reference is pointing to an invalid resource. This is called a
dangling pointer or ‘use after free’, when the resource is memory.