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fix: bug in markNestedProofs within grind #6500

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Jan 2, 2025
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fix: bug in markNestedProofs within grind #6500

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6 changes: 3 additions & 3 deletions src/Lean/Meta/Tactic/Grind/MarkNestedProofs.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -28,9 +28,9 @@ where
| .bvar .. => unreachable!
-- See comments on `Canon.lean` for why we do not visit these cases.
| .letE .. | .forallE .. | .lam ..
| .const .. | .lit .. | .mvar .. | .sort .. | .fvar ..
| .proj ..
| .mdata .. => return e
| .const .. | .lit .. | .mvar .. | .sort .. | .fvar .. => return e
| .proj _ _ b => return e.updateProj! (← visit b)
| .mdata _ b => return e.updateMData! (← visit b)
-- We only visit applications
| .app .. =>
-- Check whether it is cached
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6 changes: 6 additions & 0 deletions tests/lean/run/grind_nested_proof_issue.lean
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@@ -0,0 +1,6 @@
example (as bs : Array α) (v : α)
(i : Nat)
(h₁ : i < as.size)
(h₂ : bs = as.set i v)
: (as.set i v).size = as.size → as.size = bs.size := by
grind
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