code: def test_break_many_in_loop(tmp_path):
      im = Image.new("L", (256, 5))
      px = im.load()
      for y in range(4):
          for x in range(256):
              px[x, y] = x % 128
      for x in range(8):
          px[x, 4] = 16
      _test_buffer_overflow(tmp_path, im)
  
file_path: pillow/Tests/test_file_pcx.py
imports: from __future__ import annotations
  import pytest
  from PIL import Image, ImageFile, PcxImagePlugin
  from .helper import assert_image_equal, hopper
label_desc: Use image node_id 12 for calling a global function with example usage: test_break_many_in_loop(tmp_path) without return types