Commits on Feb 10, 2021

1. Allow casting mut array ref to mut ptr …

   We now allow two new casts:
   
   - mut array reference to mut ptr. Example:
   
         let mut x: [usize; 2] = [0, 0];
         let p = &mut x as *mut usize;
   
     We allow casting const array references to const pointers so not
     allowing mut references to mut pointers was inconsistent.
   
   - mut array reference to const ptr. Example:
   
         let mut x: [usize; 2] = [0, 0];
         let p = &mut x as *const usize;
   
     This was similarly inconsistent as we allow casting mut references to
     const pointers.
   
   Existing test 'vector-cast-weirdness' updated to test both cases.
   
   Fixes rust-lang#24151

   

   osa1 committed Feb 10, 2021
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