2025/01/15

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2025-01-15 18:45:59 +0100 <Guest12> is there an easy fix for this or should I do something like install an older version of ghc?
2025-01-15 18:45:43 +0100 <Guest12> after `cabal install` I get an error
2025-01-15 18:45:41 +0100Tetard(~Tetard@94.187.134.188) ()
2025-01-15 18:45:34 +0100 <Guest12> hi there, I'm a beginner and I'm trying to install the package https://hackage.haskell.org/package/Craft3e-0.1.1.1 but it appears to be outdated
2025-01-15 18:45:10 +0100Guest12(~Guest12@94.7.192.138)
2025-01-15 18:38:40 +0100aku(aku@65.108.245.241) eagleflo
2025-01-15 18:38:09 +0100Tetard(~Tetard@94.187.134.188)
2025-01-15 18:34:52 +0100Igloo(~ian@81.2.99.210) Igfoo
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2025-01-15 18:01:27 +0100acidjnk_new(~acidjnk@p200300d6e7283f02edd754543fe6660f.dip0.t-ipconnect.de) acidjnk
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2025-01-15 17:39:22 +0100YoungFrog(~youngfrog@39.129-180-91.adsl-dyn.isp.belgacom.be) youngfrog
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2025-01-15 17:36:36 +0100euleritian(~euleritia@77.23.250.232)
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2025-01-15 17:16:27 +0100ft(~ft@p4fc2a354.dip0.t-ipconnect.de) ft
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2025-01-15 17:08:09 +0100 <pounce> (inhabitants because without K there isn't necessarily _one_)
2025-01-15 17:07:23 +0100 <tomsmeding> in haskell the proof could be `undefined`
2025-01-15 17:07:19 +0100 <pounce> the only inhabitants of a = a are generated by refl. there's no bot
2025-01-15 17:07:16 +0100 <tomsmeding> right, that's a thing in agda
2025-01-15 17:06:57 +0100 <pounce> you don't need to 'use' the proof
2025-01-15 17:06:52 +0100 <Leary> It's /statically/ verified. Haskell's `Refl` requires pattern matching for soundness only because it's lifted.
2025-01-15 17:06:50 +0100 <pounce> tomsmeding: if you have an inhabitant of the equality proof then it already holds
2025-01-15 17:06:34 +0100Guest78(~Guest78@37.228.251.150) (Quit: Client closed)
2025-01-15 17:06:25 +0100 <tomsmeding> but how can an equality proof be erased if you're depending on it to hold?
2025-01-15 17:05:46 +0100 <pounce> i _think_ so. i usually use --without-k which doesn't allow all dot patterns for equality
2025-01-15 17:05:06 +0100 <tomsmeding> pounce: if you pattern-match on a Refl in agda, can you still mark that argument as erased?