unsafe { Some(&*(self.inner.error() as *const dyn StdError as *const E)) }

            Some(unsafe { &*(&self.inner.error as *const () as *const E) })

            unsafe { Some(&mut *(self.inner.error_mut() as *mut dyn StdError as *mut E)) }

            Some(unsafe { &mut *(&mut self.inner.error as *mut () as *mut E) })