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-rw-r--r--compiler/GHC/Hs/Utils.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Hs/Utils.hs b/compiler/GHC/Hs/Utils.hs
index c32ec443af..d53fc51786 100644
--- a/compiler/GHC/Hs/Utils.hs
+++ b/compiler/GHC/Hs/Utils.hs
@@ -1235,7 +1235,7 @@ class UnXRec p => CollectPass p where
instance IsPass p => CollectPass (GhcPass p) where
collectXXPat _ flag ext =
case ghcPass @p of
- GhcPs -> noExtCon ext
+ GhcPs -> dataConCantHappen ext
GhcRn
| HsPatExpanded _ pat <- ext
-> collect_pat flag pat