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The exists tactic does not do capture-avoiding substitution #22

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chaudhuri opened this issue Oct 30, 2013 · 0 comments
Closed

The exists tactic does not do capture-avoiding substitution #22

chaudhuri opened this issue Oct 30, 2013 · 0 comments
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Consider the following Abella development.

Kind i type.

Theorem foo : exists (x:i), exists y, x = y.
assert exists (y:i), y = y.
case H1. exists y.

The final exists y produces the obligation exists y, y = y instead of the obligation exists y1, y = y1.

This bug is reported by @matteocimini.
@ghost ghost assigned chaudhuri Oct 30, 2013
@agacek agacek closed this as completed in 978e477 Oct 30, 2013
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