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-rw-r--r--compiler/iface/MkIface.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/iface/MkIface.hs b/compiler/iface/MkIface.hs
index e7cc3adc19..7b89147f2c 100644
--- a/compiler/iface/MkIface.hs
+++ b/compiler/iface/MkIface.hs
@@ -1102,8 +1102,8 @@ mkIfaceExports exports
sort_subs (Avail n) = Avail n
sort_subs (AvailTC n []) = AvailTC n []
sort_subs (AvailTC n (m:ms))
- | n==m = AvailTC n (m:sortBy stableNameCmp ms)
- | otherwise = AvailTC n (sortBy stableNameCmp (m:ms))
+ | n==m = AvailTC n (m:sortBy (stableNameCmp `on` nameWarnName) ms)
+ | otherwise = AvailTC n (sortBy (stableNameCmp `on` nameWarnName) (m:ms))
-- Maintain the AvailTC Invariant
{-