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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org

Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)

The Debugging Book

Welcome to "The Debugging Book"! Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.

importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")

A Textbook for Paper, Screen, and Keyboard

You can use this book in multiple ways:

Who this Book is for

This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.

News

This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.

About

Project page for "The Debugging Book"

www.debuggingbook.org/

Topics

automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook

Resources

Readme
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Activity
Custom properties

Stars

281 stars

Watchers

11 watching

Forks

173 forks
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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
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11 watching
Forks
173 forks
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
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Used by
Contributors
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
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Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Code TestsNotebook TestsStatic Type CheckingImportsWebsite www.debuggingbook.org
Launch BinderMade with PythonMade with JupyterLicense: MIT (Code), CC BY-NC-SA (Book)
The Debugging Book
Welcome to "The Debugging Book"!
Software has bugs, and finding bugs can involve lots of effort. This book addresses this problem by automating software debugging, specifically by locating errors and their causes automatically. Recent years have seen the development of novel techniques that lead to dramatic improvements in automated software debugging. They now are mature enough to be assembled in a book – even with executable code.
importbookutils.setup
frombookutilsimportYouTubeVideoYouTubeVideo("-nOxI6Ev_I4")
A Textbook for Paper, Screen, and Keyboard
You can use this book in multiple ways:
Who this Book is for
This work is designed as a textbook for a course in software debugging; as supplementary material in a software testing or software engineering course; and as a resource for software developers. We cover fault localization, program slicing, input reduction, automated repair, and much more, illustrating all techniques with code examples that you can try out yourself.
News
This book is work in progress. All chapters planned are out now, but we keep on refining text and code with minor and major releases. To get notified on updates, follow us on Mastodon.
About
Project page for "The Debugging Book"
www.debuggingbook.org/
Topics
automated-debuggingdebuggersdebuggingdebugging-toolsinteractive-notebooksjupyter-notebookspythontextbook
Resources
Readme
License
Activity
Custom properties
Stars
281 stars
Watchers
11 watching
Forks
173 forks
Report repository
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Used by
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