<jupyter_start><jupyter_text>Tracking BugsSo far, we have assumed that failures would be discovered and fixed by a single programmer during development. But what if the user who discovers a bug is different from the developer who eventually fixes it? In this case, users have to _report_ bugs, and one needs to ensure that reported bugs are systematically _tracked_. This is the job of dedicated _bug tracking systems_, which we will discuss (and demo) in this chapter.<jupyter_code>from bookutils import YouTubeVideo
YouTubeVideo("bJzHYzvxHm8")<jupyter_output><empty_output><jupyter_text>**Prerequisites*** You should have read the [Introduction to Debugging](Intro_Debugging.ipynb).<jupyter_code>import bookutils
import Intro_Debugging
import os
import sys
# ignore
if 'CI' in os.environ:
    # Can't run this in our continuous environment,
    # since it can't run a headless Web browser
    sys.exit(0)<jupyter_output><empty_output>
{'fraction_non_alphanumeric': 0.05982905982905983, 'fraction_numerical': 0.002136752136752137, 'mean_word_length': 5.889705882352941, 'pattern_counts': {'":': 0, '<': 9, '<?xml version=': 0, '>': 9, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'chain_length': '2', 'dir': 'jupyter-structured-clean-dedup', 'id': '54147', 'license': 'MIT', 'n_tokens_mistral': 271, 'n_tokens_neox': 262, 'n_words': 114, 'path': 'notebooks/Tracking.ipynb', 'repo_name': 'Tobias-Buerger/debuggingbook', 'size': '936'}