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-rw-r--r--compiler/typecheck/TcPat.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/typecheck/TcPat.hs b/compiler/typecheck/TcPat.hs
index 486210cb07..07f945ccf3 100644
--- a/compiler/typecheck/TcPat.hs
+++ b/compiler/typecheck/TcPat.hs
@@ -468,7 +468,7 @@ tc_pat penv (TuplePat pats boxity _) pat_ty thing_inside
| otherwise = unmangled_result
; pat_ty <- readExpType pat_ty
- ; ASSERT( length con_arg_tys == length pats ) -- Syntactically enforced
+ ; ASSERT( con_arg_tys `equalLength` pats ) -- Syntactically enforced
return (mkHsWrapPat coi possibly_mangled_result pat_ty, res)
}