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-rw-r--r--compiler/main/Constants.hs3
1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/main/Constants.hs b/compiler/main/Constants.hs
index 0f23fc242e..22bd4e6e02 100644
--- a/compiler/main/Constants.hs
+++ b/compiler/main/Constants.hs
@@ -17,6 +17,9 @@ mAX_TUPLE_SIZE :: Int
mAX_TUPLE_SIZE = 62 -- Should really match the number
-- of decls in Data.Tuple
+mAX_CTUPLE_SIZE :: Int -- Constraint tuples
+mAX_CTUPLE_SIZE = 8 -- Should match the number of decls in GHC.Classes
+
-- | Default maximum depth for both class instance search and type family
-- reduction. See also Trac #5395.
mAX_REDUCTION_DEPTH :: Int