fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

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fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

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@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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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

fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

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@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Choose a reason for hiding this comment

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Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Choose a reason for hiding this comment

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Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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@onurtemizkan@mydea
, '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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fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

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@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

Copy link
Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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@onurtemizkan@mydea
, '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

fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

Conversation

@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

Copy link
Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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ContributorAuthor

@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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2 participants

@onurtemizkan@mydea
, '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

fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

Conversation

@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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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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fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

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onurtemizkan wants to merge 3 commits into
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onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

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@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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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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fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

Conversation

@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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@onurtemizkan@mydea
, '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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fix(v8/react): Add support for React Router sub-routes from handle (#17277) - #17433

Closed
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8
Closed

fix(v8/react): Add support for React Router sub-routes from handle (#17277)#17433
onurtemizkan wants to merge 3 commits into
v8from
onur/backport/lazy-routes-fix-to-v8

Conversation

@onurtemizkan

@onurtemizkanonurtemizkan commented Aug 20, 2025

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Backports #17277 and (the fix apart from the refactor at #17438) to v8

@onurtemizkan
onurtemizkan marked this pull request as ready for review August 21, 2025 07:57
Comment on lines +132 to +139
function processResolvedRoutes(resolvedRoutes: RouteObject[], parentRoute?: RouteObject): void {
resolvedRoutes.forEach(child => {
allRoutes.add(child);
// Only check for async handlers if the feature is enabled
if (_enableAsyncRouteHandlers) {
checkRouteForAsyncHandler(child);
}
});

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Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The processResolvedRoutes function lacks cycle detection, which can cause infinite recursion and a stack overflow if a route handler returns a circular reference.
  • Description: The processResolvedRoutes function iterates through resolved routes to check for async handlers. However, it lacks a check to see if a route has already been processed. If an async route handler's result contains a circular reference (e.g., a route that is an ancestor in the routing tree), the function will enter an infinite recursion loop (processResolvedRoutes -> checkRouteForAsyncHandler -> handleAsyncHandlerResult -> processResolvedRoutes). This leads to a stack overflow, crashing the application.

  • Suggested fix: Add a guard within the forEach loop in processResolvedRoutes to check if a route has already been processed before calling checkRouteForAsyncHandler. This can be done by checking if (!allRoutes.has(child)), mirroring the protective logic found in getChildRoutesRecursively.
    severity: 0.85, confidence: 0.9

Did we get this right? 👍 / 👎 to inform future reviews.

Comment on lines +191 to +196
for (const key of Object.keys(route.handle)) {
const maybeFn = route.handle[key];
if (typeof maybeFn === 'function' && !(maybeFn as { __sentry_proxied__?: boolean }).__sentry_proxied__) {
route.handle[key] = createAsyncHandlerProxy(maybeFn, route, key);
}
}

Copy link
Copy Markdown

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Potential bug: The checkRouteForAsyncHandler function proxies all functions in a route's handle, not just async loaders, causing significant performance overhead due to a logical flaw.
  • Description: The checkRouteForAsyncHandler function indiscriminately proxies every function found within a route's handle object. The handle object is often used for various purposes, including synchronous utility functions or metadata generators, not just the intended async route loaders. Every call to any of these proxied functions incurs unnecessary overhead from the proxy's apply trap and the subsequent call to handleAsyncHandlerResult. Because this logic is applied recursively to the entire route tree, it can cause significant performance degradation in applications with complex routing.

  • Suggested fix: Refine the logic in checkRouteForAsyncHandler to only proxy functions that are intended to be async route handlers. This could be achieved by checking for a specific naming convention for the handler key or introducing a mechanism to opt-in specific functions for proxying, rather than proxying all functions by default.
    severity: 0.7, confidence: 0.95

Did we get this right? 👍 / 👎 to inform future reviews.

@onurtemizkan
onurtemizkanforce-pushed the onur/backport/lazy-routes-fix-to-v8 branch from f8450d2 to 0e2892bCompareSeptember 1, 2025 21:50
@onurtemizkan

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ContributorAuthor

@mydea, @chargome - I also added the fix inside #17438 here. The CI is not picking up this PR, though.

@mydea

mydea commented Sep 2, 2025

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v8 is currently not ship-able, because it still uses ubuntu-20.04 runners 😭 need to "fix" that first... basically the same as #17083 for v8 branch

@onurtemizkan
onurtemizkan deleted the onur/backport/lazy-routes-fix-to-v8 branch December 22, 2025 10:03
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@onurtemizkan@mydea