Possible error on Chapter 4.3

[musjj]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • Chapter 4
• I have checked the latest main branch to see if this has already been fixed, in this file:
  • https://github.com/cognitive-engineering-lab/rust-book/blob/ac62c321975f98b7021e1023c8ceceafa8311a6e/src/ch04-03-fixing-ownership-errors.md?plain=1#L213-L218

URL to the section(s) of the book with this problem: https://rust-book.cs.brown.edu/ch04-03-fixing-ownership-errors.html#fixing-an-unsafe-program-copying-vs-moving-out-of-a-collection

Description of the problem: v should not lose read permission in second line.

Suggested fix: v should keep its read permission.

[willcrichton]

Hi, thanks for the issue. This is one of those technically-correct but confusing behaviors right now, an instance of cognitive-engineering-lab/aquascope#85. v loses read permissions because it is no longer live at that line. But if you extended the live range of v by reading it later, that would be totally fine. As mentioned in the linked issue, we're working on a clearer explanation of this idea!