warning: variable `previous_end` is assigned to, but never used
  --> <project>/reports/os-implementation/K1615-turkfs-reader-local-KbG4LA/mutant/kernel/tests/os/../../../os-turkfs-reader/src/lib.rs:36:13
   |
36 |         let mut previous_end = 0u64;
   |             ^^^^^^^^^^^^^^^^
   |
   = note: consider using `_previous_end` instead
   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default

warning: value assigned to `previous_end` is never read
  --> <project>/reports/os-implementation/K1615-turkfs-reader-local-KbG4LA/mutant/kernel/tests/os/../../../os-turkfs-reader/src/lib.rs:50:13
   |
50 |             previous_end = end;
   |             ^^^^^^^^^^^^^^^^^^
   |
   = help: maybe it is overwritten before being read?
   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default

warning: 2 warnings emitted