7d60d8b563
previously, `#eval` would happily evaluate expressions that contain `sorry`, either explicitly or because of failing tactics. In conjunction with operations like array access this can lead to the lean process crashing, which isn't particularly great. So how `#eval` will refuse to run code that (transitively) depends on the `sorry` axiom (using the same code as `#print axioms`). If the user really wants to run it, they can use `#eval!`. Closes #1697
13 lines
185 B
Text
13 lines
185 B
Text
structure S :=
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(a : Nat) (h : a > 0) (b : Nat)
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def f (s : S) :=
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s.b - s.a
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/--
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warning: declaration uses 'sorry'
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---
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info: 25
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-/
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#guard_msgs in
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#eval! f {a := 5, b := 30, h := sorry }
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