pattern...broken invariant: pattern has metachars but shouldn'tunsafe precondition(s) violated: Vec::set_len requires that new_len <= capacity()

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::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.