Class WizardStepError

Error thrown by WizardBuilder.run when a step's items/value/ validate callback (or a branch() function) throws or rejects. Cancellation — Escape, back, losing focus — never throws; only a genuinely unexpected failure does. A caller therefore branches on the returned outcome for "the user gave up" and catches only for "something broke", rather than having to tell those two apart inside one catch. error.cause holds the original error.

The state snapshot is deliberately not carried: wizard state may contain secrets, and an error object travels further than the wizard's caller. The original cause may still contain callback-provided sensitive text; redact it before sending the error to telemetry or a user-facing report.