From 2f4841a9124d45ab0af620752d90a7270d2e71dd Mon Sep 17 00:00:00 2001
From: Luke Murphy <lukewm@riseup.net>
Date: Wed, 20 Dec 2017 11:43:46 +0100
Subject: [PATCH] Revert "rank2classes testsuite fails (#3122)"

This reverts commit 704cd1206bca184d5c904d58a45ca2d56bb7b39d.

Closes https://github.com/fpco/stackage/pull/3122.
---
 build-constraints.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/build-constraints.yaml b/build-constraints.yaml
index 815525d5..b4872260 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -598,7 +598,7 @@ packages:
         - incremental-parser
         - monoid-subclasses
         - picoparsec
-        # - rank2classes # doctest https://github.com/fpco/stackage/pull/3122
+        - rank2classes
 
     "Brent Yorgey <byorgey@gmail.com> @byorgey":
         - active