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-rw-r--r--compiler/GHC/Core/Opt/Simplify/Utils.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Core/Opt/Simplify/Utils.hs b/compiler/GHC/Core/Opt/Simplify/Utils.hs
index ec26ba89fb..a673ba2ce0 100644
--- a/compiler/GHC/Core/Opt/Simplify/Utils.hs
+++ b/compiler/GHC/Core/Opt/Simplify/Utils.hs
@@ -1991,7 +1991,7 @@ abstractFloats :: UnfoldingOpts -> TopLevelFlag -> [OutTyVar] -> SimplFloats
abstractFloats uf_opts top_lvl main_tvs floats body
= assert (notNull body_floats) $
assert (isNilOL (sfJoinFloats floats)) $
- do { (subst, float_binds) <- mapAccumLM abstract empty_subst body_floats
+ do { (subst, float_binds) <- mapAccumLM' abstract empty_subst body_floats
; return (float_binds, GHC.Core.Subst.substExpr subst body) }
where
is_top_lvl = isTopLevel top_lvl