for safety.assertion failed: buf.len() <= c_int::MAX as usizeunsafe precondition(s) violated: Layout::from_size_align_unchecked requires that align is a power of 2 and the rounded-up allocation size does not exceed isize::MAX

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.called `Result::unwrap()` on an `Err` valueUtf8Errorvalid_up_toerror_lenunsafe precondition(s) violated: slice::get_unchecked_mut requires that the index is within the slice

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.