From 1e1126ae941772c29ff41e91c6783c1eafb46e2e Mon Sep 17 00:00:00 2001
From: Ivan Gromakovskii <gie1994@gmail.com>
Date: Thu, 21 Apr 2022 12:33:55 +0300
Subject: [PATCH] Do not build universum-doctest with GHC >= 9.0.0
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Problem: universum-doctest passes with GHC < 9, but starts to
fail with >= 9. The errors are weird, it complains that a lot of
stuff is not in scope. Example:
> Not in scope: type constructor or class ‘Text’

Solution: there is the following issue
https://github.com/sol/doctest/issues/327. Apparently, something is
wrong in `doctest` itself. The maintainer intends to investigate it,
so let's wait for that. While waiting, let's disable
`universum-doctest` whenever GHC is >= 9.0.0.
---
 universum.cabal | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/universum.cabal b/universum.cabal
index 117cda6..8185733 100644
--- a/universum.cabal
+++ b/universum.cabal
@@ -149,6 +149,10 @@ test-suite universum-doctest
 
   if impl(ghc >= 8.10.1)
     ghc-options:         -Wno-missing-safe-haskell-mode
+  -- https://github.com/sol/doctest/issues/327
+  -- TODO: re-enable when the issue is resolved
+  if impl(ghc >= 9.0.0)
+    buildable: False
 
   ghc-options:         -threaded