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-rw-r--r--compiler/utils/Interval.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/utils/Interval.hs b/compiler/utils/Interval.hs
index 8d96b19c7d..03545ebc40 100644
--- a/compiler/utils/Interval.hs
+++ b/compiler/utils/Interval.hs
@@ -111,6 +111,6 @@ rev_app :: [a] -> [a] -> [a]
rev_app [] xs = xs
rev_app (y:ys) xs = rev_app ys (y:xs)
-
-_unused :: FS.FastString
+_unused :: ()
_unused = undefined i_min i_lim overlaps contains
+