guix/gnu/packages/patches/ghc-aeson-encodeDouble.patch

From 58766a1916b4980792763bab74f0c86e2a7ebf20 Mon Sep 17 00:00:00 2001
From: Oleg Grenrus <oleg.grenrus@iki.fi>
Date: Thu, 1 Jun 2023 22:58:28 +0300
Subject: [PATCH] QC-2.14.3 Double generators generates infinite number too

---
 tests/PropUtils.hs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/PropUtils.hs b/tests/PropUtils.hs
index 3c449029a..43de85d7f 100644
--- a/tests/PropUtils.hs
+++ b/tests/PropUtils.hs
@@ -51,8 +51,9 @@ import qualified Data.Aeson.Decoding as Dec
 
 encodeDouble :: Double -> Double -> Property
 encodeDouble num denom
-    | isInfinite d || isNaN d = encode d === "null"
-    | otherwise               = (read . L.unpack . encode) d === d
+    | isNaN d      = encode d === "null"
+    | isInfinite d = if d > 0 then encode d === "\"+inf\"" else encode d === "\"-inf\""
+    | otherwise    = (read . L.unpack . encode) d === d
   where d = num / denom
 
 encodeInteger :: Integer -> Property