d8e719f9ab
The new option `set_option debug.skipKernelTC true` is meant for temporarily working around kernel performance issues. It compromises soundness because a buggy tactic may produce an invalid proof, and the kernel will not catch it if the new option is set to true.
24 lines
564 B
Text
24 lines
564 B
Text
import Lean
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open Lean Meta Elab Tactic in
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elab "my_tac" : tactic =>
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liftMetaTactic1 fun mvarId => do
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mvarId.assign (mkConst ``True.intro)
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return none
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example : True := by
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my_tac -- should work
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/--
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error: (kernel) declaration type mismatch, '_example' has type
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True
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but it is expected to have type
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1 = 2
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-/
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#guard_msgs in
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example : 1 = 2 := by
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my_tac -- generates invalid proof that is rejected by the kernel
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set_option debug.skipKernelTC true in
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example : 1 = 2 := by
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my_tac -- generates invalid proof that is **not** checked by the kernel
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