Commits on Apr 3, 2022

1. Fix &mut invalidation in ptr::swap doctest …

   Under Stacked Borrows with raw pointer tagging, the previous code was UB
   because the code which creates the the second pointer borrows the array
   through a tag in the borrow stacks below the Unique tag that our first
   pointer is based on, thus invalidating the first pointer.
   
   This is not definitely a bug and may never be real UB, but I desperately
   want people to write code that conforms to SB with raw pointer tagging
   so that I can write good diagnostics. The alternative aliasing models
   aren't possible to diagnose well due to state space explosion.
   Therefore, it would be super cool if the standard library nudged people
   towards writing code that is valid with respect to SB with raw pointer
   tagging.

   

   saethlin committed Apr 3, 2022
   Configuration menu

   • View commit details
   • Copy full SHA for f4a7ed4
   • Browse repository at this point

   Copy the full SHA

   f4a7ed4 View commit details

   Browse the repository at this point in the history