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A tiny project that uses spdlog.

Build

The "stress" parameter is optional (and defaults to false)

 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress

Your task Identify and fix as many correctness issues as you reasonably can. For each fix, briefly explain: what the problem was why it happens (especially why it’s intermittent) why your fix is correct

Constraints Do not remove async logging.

Upload solutions to github with Readme

Summary of bug fixes

FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock

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Tiny project that uses spdlog.

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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" + '

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A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
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0 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('^' + ".*" + '

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A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
Resources
Readme
Activity
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0 stars
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0 watching
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0 forks
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, '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('^' + ".*" + '

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NameName
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CMakeLists.txt
CMakeLists.txt
README.md
README.md
Repository files navigation
A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
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Readme
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0 watching
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0 forks
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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" + '

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NameName
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CMakeLists.txt
CMakeLists.txt
README.md
README.md
Repository files navigation
A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, '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('^' + ".*" + '

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3 Commits
Folders and files
NameName
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src
src
CMakeLists.txt
CMakeLists.txt
README.md
README.md
Repository files navigation
A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, '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('^' + ".*" + '

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CMakeLists.txt
README.md
README.md
Repository files navigation
A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
Resources
Readme
Activity
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0 watching
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0 forks
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, '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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CMakeLists.txt
CMakeLists.txt
README.md
README.md
Repository files navigation
A tiny project that uses spdlog.
Build
The "stress" parameter is optional (and defaults to false)
 cmake -S . -B build
cmake --build build -j
./build/spdlogger --seconds 5
./build/spdlogger --seconds 5 --stress
Your task
Identify and fix as many correctness issues as you reasonably can.
For each fix, briefly explain:
what the problem was
why it happens (especially why it’s intermittent)
why your fix is correct
Constraints
Do not remove async logging.
Upload solutions to github with Readme
Summary of bug fixes
FileBugType
string_uaf.hDangling pointer to a local std::string variableUse-after-free
shutdown.hspdlog::shutdown() called while other threads a loggingRace/Undefined behaviour at shutdown
level.hdelete &s on a class member that was not dynamically allocatedUndefined behaviour (destructor)
level.hg_level non-atomic shared between threadsData race
timebase.hMixing steady_clock/system_clockLogic
sink_callback.hRe-entrant logging from sink_it_()Possible deadlock
About
Tiny project that uses spdlog.
Resources
Readme
Activity
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
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