From 41ac9ddde0781a691683027a6d7da9c5b6594cda Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Sat, 26 Feb 2022 10:07:37 +0100
Subject: [PATCH] haskellPackages.reflection: disable tests for GHC 9.0.2
 everywhere

Thanks to Ryan Scott's investigation it became clear this crash can also
happen on Linux and thus seems to be a general issue in GHC 9.0.2 (only,
luckily). We'll disable the test suite everywhere for now, but the
prospect of this crash / incorrect runtime result is a bit ominous.
Refer to the [ghc-issue] for details.

[ghc-issue]: https://gitlab.haskell.org/ghc/ghc/-/issues/21141
---
 pkgs/development/haskell-modules/configuration-darwin.nix    | 4 ----
 pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix | 5 +++++
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/haskell-modules/configuration-darwin.nix b/pkgs/development/haskell-modules/configuration-darwin.nix
index 3fa4f08f8525..825262fe4b47 100644
--- a/pkgs/development/haskell-modules/configuration-darwin.nix
+++ b/pkgs/development/haskell-modules/configuration-darwin.nix
@@ -282,10 +282,6 @@ self: super: ({
     '' + drv.postPatch or "";
   }) super.foldl;
 
-  # Strange crash in test suite
-  # https://github.com/ekmett/reflection/issues/51
-  reflection = dontCheck super.reflection;
-
 } // lib.optionalAttrs pkgs.stdenv.isAarch64 {  # aarch64-darwin
 
   # https://github.com/fpco/unliftio/issues/87
diff --git a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
index 1f78c07ed0d6..7f0beb4fc4ad 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-9.0.x.nix
@@ -95,6 +95,11 @@ self: super: {
   # https://github.com/snoyberg/mono-traversable/issues/192
   mono-traversable = dontCheck super.mono-traversable;
 
+  # Test suite sometimes segfaults with GHC 9.0.1 and 9.0.2
+  # https://github.com/ekmett/reflection/issues/51
+  # https://gitlab.haskell.org/ghc/ghc/-/issues/21141
+  reflection = dontCheck super.reflection;
+
   # Disable tests pending resolution of
   # https://github.com/Soostone/retry/issues/71
   retry = dontCheck super.retry;