Next 16.3.0 on Vercel: production functions fail at module load with TypeError "Cannot read properties of undefined (reading 'output')" in /opt/rust/bytecode.js

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

Frontend application developer

Job to be done

Deploy a service reliably

Workflow

Next 16.3.0 on Vercel: production functions fail at module load with TypeError "Cannot read properties of undefined (reading 'output')" in /opt/rust/bytecode.js (regression since 16.3.0-preview.8)

Desired outcome

If some emitted artifact is genuinely malformed or unsupported, `next build` should fail — not defer the failure to production module load with a stack that contains no actionable frame.

Severity

Not enough evidence yet.

Urgency

high

Evidence indicators

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