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-rw-r--r--compiler/deSugar/DsArrows.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/deSugar/DsArrows.hs b/compiler/deSugar/DsArrows.hs
index c69d7495d9..8837eeae40 100644
--- a/compiler/deSugar/DsArrows.hs
+++ b/compiler/deSugar/DsArrows.hs
@@ -1224,7 +1224,7 @@ collectl (L _ pat) bndrs
go (NPat {}) = bndrs
go (NPlusKPat _ (L _ n) _ _ _ _) = n : bndrs
- go (SigPat _ pat) = collectl pat bndrs
+ go (SigPat _ pat _) = collectl pat bndrs
go (CoPat _ _ pat _) = collectl (noLoc pat) bndrs
go (ViewPat _ _ pat) = collectl pat bndrs
go p@(SplicePat {}) = pprPanic "collectl/go" (ppr p)