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Idris eagerly selects incorrect concrete type when pattern matching #4865

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mb64 opened this issue May 27, 2020 · 0 comments
Open

Idris eagerly selects incorrect concrete type when pattern matching #4865

mb64 opened this issue May 27, 2020 · 0 comments

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@mb64
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mb64 commented May 27, 2020

Steps to Reproduce

x : Num a => Maybe a
x = Just 1

y : Int
y with (x)
  | Just n = n
  | Nothing = 0

Expected/Observed Behavior

I expect this use of x to be inferred to have concrete type Maybe Int, but it is inferred to have concrete type Maybe Integer.
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@mb64