Undefined behavior in tests about decancer HOT 3 CLOSED

--- STDERR:              decancer tests::isolating_run_sequences ---
error: Undefined Behavior: using uninitialized data, but this operation requires initialized memory
   --> src/tests.rs:233:14
    |
233 |       range: MaybeUninit::uninit().assume_init(),
    |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ using uninitialized data, but this operation requires initialized memory
    |
    = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
    = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
    = note: BACKTRACE on thread `tests::isolatin`:
    = note: inside `tests::isolating_run_sequences` at src/tests.rs:233:14: 233:49