Debugger process finished with exit code -1073741819 (0xC0000005) in Rust rover

Hi, this is my first post, so apologies if this isn't the right place, and I couldn't find a dedicated forum for this. I'm running a debugger on the following code, but I keep encountering an error where the debugger process finishes with exit code -1073741819 (0xC0000005) within a few seconds of running without me doing anything.

Here is the code I'm working with:

use crate::board::board::Board;
pub mod board;
pub mod movegen;
#[cfg(test)]
pub mod board_tests;
mod perft;
use clap::Parser;
use crate::movegen::generate::generate_moves;
use crate::perft::perft;
#[derive(Parser, Debug)]
#[command(name = "Rookbot", version = "1.0", about = "A chess engine command-line parser")]
struct Args {
   /// Search depth or arbitrary number
   depth: u32,
   /// FEN string representing the chess position
   fen: String,
   /// Moves in algebraic notation
   #[arg(required = false)]
   moves: Vec<String>,
}
fn main() {
   let args: Args = Args::parse();
   let Args { depth, fen, moves } = args;
   let mut board = Board::from_fen(&fen);
   for mv in moves.iter() {
       let legal_moves = generate_moves(&mut board);
       let mv_to_apply = legal_moves.iter().find(|&m| m.to_algebraic() == *mv).expect("Invalid move");
       board.make_move(mv_to_apply);
   }
   print!("{} , {}, {:?}", fen, depth, moves);
   let s = perft(&mut board, depth);
   println!("{}", s);
}

The error seems to happen right away after starting the debugger in Rust Rover. I haven't clicked on anything yet. The exit code -1073741819 (0xC0000005) typically indicates an access violation, so I'm guessing there may be an issue with memory access or a null pointer.

Thanks in advance for any help or guidance on this!