3a457e6ad6
Many of our tests in `tests/lean/run/` produce output from `#eval` (or `#check`) statements, that is then ignored. This PR tries to capture all the useful output using `#guard_msgs`. I've only done a cursory check that the output is still sane --- there is a chance that some "unchecked" tests have already accumulated regressions and this just cements them! In the other direction, I did identify two rotten tests: * a minor one in `setStructInstNotation.lean`, where a comment says `Set Nat`, but `#check` actually prints `?_`. Weird? * `CompilerProbe.lean` is generating empty output, apparently indicating that something is broken, but I don't know the signficance of this file. In any case, I'll ask about these elsewhere. (This started by noticing that a recent `grind` test file had an untested `trace_state`, and then got carried away.)
25 lines
728 B
Text
25 lines
728 B
Text
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namespace Repro
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def FooM (α : Type) : Type := Unit → α
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def FooM.run {α : Type} (ψ : FooM α) (x : Unit) : α := ψ x
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def bind {α β : Type} : ∀ (ψ₁ : FooM α) (ψ₂ : α → FooM β), FooM β
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| ψ₁, ψ₂ => λ _ => ψ₂ (ψ₁.run ()) ()
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instance : Pure FooM := ⟨λ x => λ _ => x⟩
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instance : Bind FooM := ⟨@bind⟩
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instance : Monad FooM := {}
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def unexpectedBehavior : FooM String := do
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let b : Bool := (#[] : Array Nat).isEmpty;
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let trueBranch ← pure "trueBranch";
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let falseBranch ← pure "falseBranch";
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(1 : Nat).foldM (λ _ (s : String) => do
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let s ← pure $ if b then trueBranch else falseBranch; pure s) ""
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/-- info: "trueBranch" -/
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#guard_msgs in
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#eval unexpectedBehavior ()
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end Repro
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