fix: nested reduce in release.md to prevent null accumulator when no PRs have closing issue references by Copilot · Pull Request #22726 · github/gh-aw

Copilot · 2026-03-24T16:48:44Z

The Release workflow's "Setup release environment" step was failing because jq's reduce sets the accumulator to null when the update body produces zero outputs — which happens when none of the fetched PRs have closingIssuesReferences. The || echo "{}" fallback only catches non-zero exit codes, so null was written to the file and the subsequent jq 'keys | length' call crashed.

Fix

Replace the flat reduce (which uses []? as a generator in the update body) with a nested reduce pattern — already used and commented in daily-community-attribution.md:

-reduce .[] as $pr (
-  {};
-  $pr.closingIssuesReferences[]? as $issue |
-  ($issue.number | tostring) as $key |
-  .[$key] = (.[$key] // []) + [$pr.number]
-)
+# Use a nested reduce so the outer body always returns the accumulator,
+# even when closingIssuesReferences is empty (avoids jq setting acc to null).
+reduce .[] as $pr (
+  {};
+  reduce ($pr.closingIssuesReferences // [])[] as $issue (
+    .;
+    ($issue.number | tostring) as $key |
+    .[$key] = (.[$key] // []) + [$pr.number]
+  )
+)

The outer reduce body now always emits exactly one value (the inner reduce result), keeping the accumulator as {} rather than null.

release.md — patched jq expression
release.lock.yml — recompiled

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Pull request overview

Fixes a jq reduce edge case in the Release workflow where the accumulator could become null (and later crash) when none of the merged PRs include any closingIssuesReferences.

Changes:

Update the jq expression in release.md to a nested reduce so the outer reducer always yields the accumulator.
Regenerate release.lock.yml to reflect the updated compiled workflow.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
`.github/workflows/release.md`	Switches closing-issue index construction to a nested `jq reduce` pattern to avoid `null` accumulator/output when no closing refs exist.
`.github/workflows/release.lock.yml`	Recompiled lockfile reflecting the updated workflow script and metadata hash.

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Initial plan

758f160

Copilot AI assigned Copilot and pelikhan Mar 24, 2026

Copilot started work on behalf of pelikhan March 24, 2026 16:48 View session

fix: use nested reduce in release.md to avoid null accumulator in jq …

0d2c6b6

…closing_refs_by_issue Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com> Agent-Logs-Url: https://github.com/github/gh-aw/sessions/06fb0692-f7dd-4bdc-8f2d-6a93cbd052d0

Copilot AI changed the title ~~[WIP] Investigate failure in GitHub Actions run~~ fix: nested reduce in release.md to prevent null accumulator when no PRs have closing issue references Mar 24, 2026

Copilot AI requested a review from pelikhan March 24, 2026 17:03

Copilot finished work on behalf of pelikhan March 24, 2026 17:03

pelikhan marked this pull request as ready for review March 24, 2026 17:07

Copilot AI review requested due to automatic review settings March 24, 2026 17:07

pelikhan merged commit f10a842 into main Mar 24, 2026
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fix: nested reduce in release.md to prevent null accumulator when no PRs have closing issue references#22726

fix: nested reduce in release.md to prevent null accumulator when no PRs have closing issue references#22726
pelikhan merged 2 commits intomainfrom
copilot/investigate-failure-issue-another-one

Copilot AI commented Mar 24, 2026 •

edited

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Copilot AI commented Mar 24, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Copilot AI commented Mar 24, 2026 •

edited

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