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fix(mcp): prevent unhandled rejection in test op queue - #40698

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Simon Knott (Skn0tt) merged 1 commit into
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fix-40582
May 7, 2026
Merged

fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
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fix-40582

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@Skn0ttSimon Knott (Skn0tt) commented May 7, 2026•
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Summary

  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves

The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.

Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).

@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Test results for "MCP"

2 failed
❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge
❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge

7013 passed, 1058 skipped

Merge workflow run.

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Test results for "tests 1"

4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree`
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22`
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22`

41651 passed, 851 skipped

Merge workflow run.

@Skn0tt
Simon Knott (Skn0tt) merged commit a2f2e02 into mainMay 7, 2026
44 of 45 checks passed
@Skn0tt
Simon Knott (Skn0tt) deleted the fix-40582 branch May 7, 2026 12:05
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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
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function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
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codeBlock.parentElement.setAttribute('data-copy-added', 'true');
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btn.textContent = 'Copy';
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btn.onmouseover = function() { this.style.opacity = '1'; };
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try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

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Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
@github-actions
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May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
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var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
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.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
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';
document.head.appendChild(style);
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}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

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Contributor
Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@github-actions
github-actionsBot
commented
May 7, 2026

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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
@github-actions
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commented
May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
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document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
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terms.forEach(function(term) {
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found = true;
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parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
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highlight(document.body);
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mutations.forEach(function(m) {
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} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

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Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@github-actions
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commented
May 7, 2026

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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
@github-actions
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commented
May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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2 participants

@Skn0tt@dgozman

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
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if (clean !== a.href) a.href = clean;
});
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cleanLinks();
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if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

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Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@github-actions
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May 7, 2026

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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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2 participants

@Skn0tt@dgozman

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
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fix-40582
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@Skn0ttSimon Knott (Skn0tt)
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May 7, 2026•

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Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
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May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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, 'i');
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

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Contributor
Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@github-actions
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May 7, 2026

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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
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May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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@Skn0tt@dgozman

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
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.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();
fix(mcp): prevent unhandled rejection in test op queue by Skn0tt · Pull Request #40698 · microsoft/playwright · GitHub
Skip to content
fix(mcp): prevent unhandled rejection in test op queue - #40698
Merged
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
May 7, 2026
Merged
fix(mcp): prevent unhandled rejection in test op queue#40698
Simon Knott (Skn0tt) merged 1 commit into
mainfrom 
fix-40582
Conversation
@Skn0tt
@Skn0ttSimon Knott (Skn0tt)
commented
May 7, 2026•

edited

Loading

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Contributor
Summary
  • Fix unhandled promise rejection in _enqueue that crashes the MCP server on Windows CI
  • Add no-op rejection handler to _testOpQueue so the queue always resolves
The error still propagates to callers via return await next — this only prevents the serialization queue from becoming permanently broken.
Fixes flaky test_run should stop when aborted on Windows (introduced in #40582).
@Skn0tt
fix(mcp): prevent unhandled rejection in test op queue
0bc26e0
The _enqueue method stores _testOpQueue as the chained promise for
serialization. If fn() ever rejects, next.then(() => {}) propagates
the rejection to _testOpQueue which has no handler attached until the
next _enqueue call arrives in a later event loop turn. Node.js detects
this as an unhandled rejection and terminates the process.
The error IS still propagated to the caller via 'return await next' —
the added no-op rejection handler only prevents the queue from being
poisoned while maintaining proper error propagation semantics.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
@github-actions
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May 7, 2026

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Test results for "MCP"
2 failed

❌ [msedge] › mcp/annotate.spec.ts:251 › should start dashboard and annotate when no dashboard is running @mcp-windows-latest-msedge

❌ [msedge] › mcp/annotate.spec.ts:297 › should annotate via direct browser_annotate MCP call @mcp-windows-latest-msedge
7013 passed, 1058 skipped
Merge workflow run.
@github-actions
github-actionsBot
commented
May 7, 2026

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Test results for "tests 1"
4 flaky⚠️ [chromium-library] › library/video.spec.ts:476 › screencast › should capture static page in persistent context Radoslav Kirilov (@smoke) `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@ubuntu-22.04-chromium-tip-of-tree` 
⚠️ [chromium-library] › library/popup.spec.ts:261 › should not throw when click closes popup `@chromium-ubuntu-22.04-node22` 
⚠️ [chromium-library] › library/video.spec.ts:719 › screencast › should work with video+trace `@chromium-ubuntu-22.04-node22` 
41651 passed, 851 skipped
Merge workflow run.
@Skn0tt
Simon Knott (Skn0tt)
merged commit a2f2e02
into
mainMay 7, 2026

44 of 45 checks passed

@Skn0tt
Simon Knott (Skn0tt)
deleted the

fix-40582

branch
May 7, 2026 12:05
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@dgozmanDmitry Gozman (dgozman)dgozman approved these changes

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2 participants

@Skn0tt@dgozman