From f90d059e61c5a8ac22a48f7663f4c5f945298ccf Mon Sep 17 00:00:00 2001
From: Javier Sagredo <jasataco@gmail.com>
Date: Wed, 28 Aug 2024 13:48:53 +0200
Subject: [PATCH] Re-enable Windows CI

(cherry picked from commit 4aade2d8a17704cfcb2fa6cf9fb59478c17a0653)
---
 .github/workflows/validate.yml | 4 ++++
 validate.sh                    | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index dd3f350db3a..00a22ad7c32 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -72,6 +72,10 @@ jobs:
         # support, so the PR *must* have a changelog entry.
         ghc: ['9.10.1', '9.8.2', '9.6.4', '9.4.8', '9.2.8', '9.0.2', '8.10.7', '8.8.4', '8.6.5']
         exclude:
+          # Throws fatal "cabal-tests.exe: fd:8: hGetLine: end of file" exception
+          # even with --io-manager=native
+          - os: windows-latest
+            ghc: "9.0.2"
           # corrupts GHA cache or the fabric of reality itself, see https://github.com/haskell/cabal/issues/8356
           - os: windows-latest
             ghc: '8.10.7'
diff --git a/validate.sh b/validate.sh
index e6cd603db41..1710cd7e2c8 100755
--- a/validate.sh
+++ b/validate.sh
@@ -324,6 +324,9 @@ CABAL_TESTSUITE_BDIR="$(pwd)/$BUILDDIR/build/$ARCH/$BASEHC/cabal-testsuite-3"
 CABALNEWBUILD="${CABAL} build $JOBS -w $HC --builddir=$BUILDDIR --project-file=$PROJECTFILE"
 CABALLISTBIN="${CABAL} list-bin --builddir=$BUILDDIR --project-file=$PROJECTFILE"
 
+# See https://github.com/haskell/cabal/issues/9571 for why we set this for Windows
+RTSOPTS="$([ $ARCH = "x86_64-windows" ] && [ "$($HC --numeric-version)" != "9.0.2" ] && [ "$(echo -e "$(ghc --numeric-version)\n9.0.2" | sort -V | head -n1)" = "9.0.2" ] && echo "+RTS --io-manager=native" || echo "")"
+
 # header
 #######################################################################