warning: variable `visited` is assigned to, but never used
  --> <project>/reports/os-implementation/K1435-pci-capabilities-local-VThJKr/mutant/kernel/tests/os/../../../os-pci-discovery/src/capabilities.rs:33:9
   |
33 |     let mut visited = 0u64;
   |         ^^^^^^^^^^^
   |
   = note: consider using `_visited` instead
   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default

warning: value assigned to `visited` is never read
  --> <project>/reports/os-implementation/K1435-pci-capabilities-local-VThJKr/mutant/kernel/tests/os/../../../os-pci-discovery/src/capabilities.rs:40:9
   |
40 |         visited |= bit;
   |         ^^^^^^^^^^^^^^
   |
   = help: maybe it is overwritten before being read?
   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default

warning: 2 warnings emitted