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-rw-r--r--compiler/basicTypes/NameSet.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/basicTypes/NameSet.hs b/compiler/basicTypes/NameSet.hs
index 14007750b9..559f43933f 100644
--- a/compiler/basicTypes/NameSet.hs
+++ b/compiler/basicTypes/NameSet.hs
@@ -195,7 +195,7 @@ findUses dus uses
= rhs_uses `unionNameSet` uses
get (Just defs, rhs_uses) uses
| defs `intersectsNameSet` uses -- Used
- || any (startsWithUnderscore . nameOccName) (nameSetElems defs)
+ || nameSetAny (startsWithUnderscore . nameOccName) defs
-- At least one starts with an "_",
-- so treat the group as used
= rhs_uses `unionNameSet` uses