lean4-htt/tests/lean/interactive/rwElabConst.lean.expected.out at f759d5dbc1aa18b36bb0affeaeb6ea094fde33db - max/lean4-htt - maxgit: wireguard access, git repository.

max/lean4-htt

JovanGerb d69a8eff3f

fix: deduplicate elaboration of constant argument to rw (#8232 )

This PR fixes elaboration of constants in the `rewrite` tactic.
previously, `rw [eq_self]` would elaborate `eq_self` twice, and add it
to the infotree twice. This would lead to the "Expected type" being
delaborated with an unknown universe metavariable.

I added a test to show this error during delaboration of the "Expected
type".

This was reported on Zulip as a panic message during delaboration:
[#mathlib4 > Crash in &#96;sup&#96;/&#96;inf&#96; /
&#96;max&#96;/&#96;min&#96;
delaborators](https://leanprover.zulipchat.com/#narrow/channel/287929-mathlib4/topic/Crash.20in.20.60sup.60.2F.60inf.60.20.2F.20.60max.60.2F.60min.60.20delaborators/with/515946714)

2025-05-15 11:33:10 +00:00

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  "position": {"line": 18, "character": 12}}
 {"range":
  {"start": {"line": 18, "character": 10}, "end": {"line": 18, "character": 17}},
  "goal": "⊢ ∀ {α : Sort ?u} (a : α), (a = a) = True"}