bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.assertion failed: self.is_char_boundary(new_len)unsafe precondition(s) violated: ptr::offset_from_unsigned requires `self >= origin`

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: str::get_unchecked requires that the range is within the string slice

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: invalid value for `char`

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: hint::unreachable_unchecked must never be reached

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.assertion failed: self.is_char_boundary(n)t