Sebastian Graf 36eaa68744 fix: make all VCs emitted by mvcgen synthetic opaque (#12048) ... This PR fixes a bug where `mvcgen` loses VCs, resulting in unassigned metavariables. It is fixed by making all emitted VCs synthetic opaque. The bug was reported by [Alexander Bentkamp on the community Zulip](https://leanprover.zulipchat.com/#narrow/channel/236449-Program-verification/topic/mvcgen.20bug.3F.20.22declaration.20has.20metavariables.22).		2026-01-19 16:51:10 +00:00
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12048.lean