error[E0623]: lifetime mismatch
  --> tests/ui-msrv/ptr-is-invariant-over-v.rs:10:14
   |
7  |     big: Ptr<'small, &'big u32, (Exclusive, Aligned, Valid)>,
   |          --------------------------------------------------- these two types are declared with different lifetimes...
...
10 |     _small = big;
   |              ^^^ ...but data from `big` flows into `big` here

error[E0623]: lifetime mismatch
  --> tests/ui-msrv/ptr-is-invariant-over-v.rs:17:14
   |
14 |     big: Ptr<'small, &'big u32, (Shared, Aligned, Valid)>,
   |          ------------------------------------------------ these two types are declared with different lifetimes...
...
17 |     _small = big;
   |              ^^^ ...but data from `big` flows into `big` here