stream: preserve falsy cancellation reasons - #64705

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nodejs-github-bot merged 1 commit into
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trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
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trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

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@trivikr@nodejs-github-bot@jasnell
, '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

stream: preserve falsy cancellation reasons - #64705

Merged
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
@nodejs-github-bot

This comment was marked as outdated.

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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
68 checks passed
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

3 participants

@trivikr@nodejs-github-bot@jasnell
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

stream: preserve falsy cancellation reasons - #64705

Merged
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

codecovBot commented Jul 24, 2026

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
@nodejs-github-bot

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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
68 checks passed
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

3 participants

@trivikr@nodejs-github-bot@jasnell
, '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

stream: preserve falsy cancellation reasons - #64705

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nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

codecovBot commented Jul 24, 2026

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

3 participants

@trivikr@nodejs-github-bot@jasnell
, '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

stream: preserve falsy cancellation reasons - #64705

Merged
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

codecovBot commented Jul 24, 2026

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
@nodejs-github-bot

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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
68 checks passed
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

3 participants

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

stream: preserve falsy cancellation reasons - #64705

Merged
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

codecovBot commented Jul 24, 2026

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
@nodejs-github-bot

This comment was marked as outdated.

@nodejs-github-bot

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@nodejs-github-bot

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@nodejs-github-bot

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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
68 checks passed
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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Labels

needs-ciPRs that need a full CI run.streamIssues and PRs related to Node.js streams.

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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

3 participants

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

stream: preserve falsy cancellation reasons - #64705

Merged
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
Merged

stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
nodejs:mainfrom
trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

@nodejs-github-bot

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
@codecov

codecovBot commented Jul 24, 2026

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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
  • 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
@nodejs-github-bot

This comment was marked as outdated.

@nodejs-github-bot

This comment was marked as outdated.

@nodejs-github-bot

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@nodejs-github-bot

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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@nodejs-github-bot
nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
68 checks passed
@nodejs-github-bot

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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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Labels

needs-ciPRs that need a full CI run.streamIssues and PRs related to Node.js streams.

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Development

Successfully merging this pull request may close these issues.

stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

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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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stream: preserve falsy cancellation reasons - #64705

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trivikr:stream-iter-broadcast-share-falsy-cancellation
Aug 14, 2026
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stream: preserve falsy cancellation reasons#64705
nodejs-github-bot merged 1 commit into
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trivikr:stream-iter-broadcast-share-falsy-cancellation

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Fixes: #64704

Previously, falsy reasons such as 0, '', false, and null were stored
but later treated as if no error existed. Consumers that had not started
waiting would therefore observe clean completion instead of the supplied
cancellation reason. Sync share also checked whether a consumer was detached
before surfacing its stored cancellation error.

This change uses undefined as the no-error sentinel and checks cancellation
reasons explicitly. Sync share now surfaces the reason before handling the
detached state.


Assisted-by: codex:gpt-5.6-sol

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Review requested:

  • @nodejs/streams

@nodejs-github-botnodejs-github-bot added needs-ci PRs that need a full CI run. stream Issues and PRs related to Node.js streams. labels Jul 24, 2026
@trivikrtrivikr added the request-ci Add this label to start a Jenkins CI on a PR. label Jul 24, 2026
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Codecov Report

❌ Patch coverage is 85.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.32%. Comparing base (bfa3e98) to head (0f06c0f).
⚠️ Report is 44 commits behind head on main.

Files with missing linesPatch %Lines
lib/internal/streams/iter/share.js85.71%2 Missing ⚠️
lib/internal/streams/iter/broadcast.js83.33%1 Missing ⚠️
Additional details and impacted files
@@ Coverage Diff @@## main #64705 +/- ##
=======================================
Coverage 90.32% 90.32% =======================================
Files 760 760 Lines 249130 249134 +4 Branches 47041 47050 +9 =======================================
+ Hits 225030 225039 +9 + Misses 15490 15487 -3 + Partials 8610 8608 -2 
Files with missing linesCoverage Δ
lib/internal/streams/iter/broadcast.js87.81% <83.33%> (+0.02%)⬆️
lib/internal/streams/iter/share.js85.47% <85.71%> (+0.16%)⬆️

... and 24 files with indirect coverage changes

🚀 New features to boost your workflow:
  • ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
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Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
@trivikr
trivikrforce-pushed the stream-iter-broadcast-share-falsy-cancellation branch from bf47906 to 0f06c0fCompareAugust 12, 2026 15:48
@jasnelljasnell removed the request-ci Add this label to start a Jenkins CI on a PR. label Aug 14, 2026
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@trivikrtrivikr added the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
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nodejs-github-bot merged commit bc813a7 into nodejs:mainAug 14, 2026
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Landed in bc813a7

@nodejs-github-botnodejs-github-bot removed the commit-queue PRs queued for automated landing through the Commit Queue. label Aug 14, 2026
@trivikr
trivikr deleted the stream-iter-broadcast-share-falsy-cancellation branch August 16, 2026 16:01
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 25, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
aduh95 pushed a commit that referenced this pull request Aug 27, 2026
Use undefined as the no-error sentinel when cancelling broadcast and
share consumers. This ensures that 0, an empty string, false, and null
are propagated instead of being converted to clean completion.
Make sync share surface cancellation reasons before handling detached
consumers, and add regression coverage for async and sync consumers.
Signed-off-by: Kamat, Trivikram <16024985+trivikr@users.noreply.github.com>
Assisted-by: codex:gpt-5.6-sol
PR-URL: #64705Fixes: #64704
Reviewed-By: James M Snell <jasnell@gmail.com>
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stream/iter: falsy cancellation reasons become clean EOF in broadcast and share

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