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-rw-r--r--compiler/codeGen/StgCmmUtils.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/codeGen/StgCmmUtils.hs b/compiler/codeGen/StgCmmUtils.hs
index c3327138b3..dda2260a04 100644
--- a/compiler/codeGen/StgCmmUtils.hs
+++ b/compiler/codeGen/StgCmmUtils.hs
@@ -458,7 +458,7 @@ newUnboxedTupleRegs res_ty
; ASSERT( regs `equalLength` reps )
return (regs, map primRepForeignHint reps) }
where
- ty_args = tyConAppArgs (repType res_ty)
+ UbxTupleRep ty_args = repType res_ty
reps = [ rep
| ty <- ty_args
, let rep = typePrimRep ty