036bd4f0df
This PR fixes an "Unknown constant" error when `set_option diagnostics true` is enabled in module mode under a `public section`. Diagnostic output may reference private declarations such as `_match_*` and `_sparseCasesOn_*` that are recorded in unfold counters; constructing the message previously failed because the environment was in exporting mode and could not resolve those names. The diagnostic-printing paths in `Lean.Meta.Diagnostics.reportDiag` and `Lean.Meta.Tactic.Simp.Diagnostics.reportDiag` now run under `withoutExporting`. Closes https://github.com/leanprover/lean4/issues/13581. 🤖 Prepared with Claude Code Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
15 lines
397 B
Text
15 lines
397 B
Text
-- https://github.com/leanprover/lean4/issues/13581
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-- Reporting `diagnostics` must not crash on private match/sparseCasesOn helpers
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-- in module mode under a `public section`.
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module
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public section
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def onlyTrue : Bool → Bool
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| true => true
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| x => x
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#guard_msgs (drop trace) in
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set_option diagnostics true in
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set_option diagnostics.threshold 0 in
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example : onlyTrue true = true := rfl
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