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Using Auto with a goal involving musical coinduction ♭ produces incorrect projection #7662

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jake-87 opened this issue Dec 20, 2024 · 0 comments
Open

Using Auto with a goal involving musical coinduction ♭ produces incorrect projection #7662

jake-87 opened this issue Dec 20, 2024 · 0 comments

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@jake-87
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jake-87 commented Dec 20, 2024 •
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  • Agda version: 2.7.0.1, w. optimize-heavily
  • Emacs version: 29.4

When utilizing the old musical coinduction notation, Auto will attempt to fill flat-involved goals with the incorrect projection x .♭, instead of the correct ♭ x.

To replicate: C-c C-a in the hole.

{-# OPTIONS --guardedness #-}
open import Codata.Musical.Notation

data ⊤ : Set where
  tt : ⊤

test : ∞ ⊤ → ⊤
test x = {!!}

Produces:

test x = x .♭

Expected:

test x = ♭ x
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@jake-87