sigcue
← Reported problems
Reported problemNot a verified signal

TypeError: Cannot read properties of undefined (reading 'summaryParts') when streaming reasoning summaries via GitHub Copilot's Responses API

TypeError: Cannot read properties of undefined (reading 'summaryParts') when streaming reasoning summaries via GitHub Copilot's Responses API

SourceGitHub
Communityvercel/ai
DateJul 31, 2026
Independent reports1

Important limitations

  • This may be one public report, not widespread demand.
  • Current independent report count: 1.
  • This is currently a single independent report. It has not passed clustering or human review as a verified signal.
  • No market size, willingness to pay, competition, or trend claims are inferred here.

What was reported

Who is affected
Application developer using the reported software
Job to be done
Run tests reliably
Workflow
I don't have a minimal repo packaged up yet, but happy to open a PR with a failing-test reproduction and/or the fix above if that's useful — let me know if a specific test fixture format is preferred.
Desired outcome
Not enough evidence yet.
Severity
Not enough evidence yet.
Urgency
high

Evidence indicators

Evidence records1
Independent reports1
Reproduction notesPresent
Metrics mentionedNot observed
Logs mentionedPresent
Corroborationuncorroborated

What would upgrade this

  • Additional independent reports from distinct communities or authors.
  • Human clustering into a review signal, then explicit publication approval.
  • Counter-evidence review and durable original-source verification.

Original source

Open the original public report