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Weird interaction between subordination and schematic theorems #144

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chaudhuri opened this issue Mar 31, 2023 · 0 comments

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bug triage-needed

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chaudhuri commented Mar 31, 2023 •

edited

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This is based on this thread on the mailing list started by Todd Wilson (@lambdacalculator). His example:

Kind t type.
% Close t.

Theorem member_prune[A] : forall E (L:list A), nabla (x:A),
  member (E x) L -> exists E', E = y\E'.
induction on 1. intros. case H1.
  search.
  apply IH to H2. search.

This fails unless the Close t is commented out. Obviously t can be introduced after the theorem is proved and there would be no error.

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chaudhuri added bug triage-needed labels

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