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-rw-r--r--compiler/typecheck/TcType.hs4
1 files changed, 2 insertions, 2 deletions
diff --git a/compiler/typecheck/TcType.hs b/compiler/typecheck/TcType.hs
index f15f704f70..9758d0370d 100644
--- a/compiler/typecheck/TcType.hs
+++ b/compiler/typecheck/TcType.hs
@@ -68,7 +68,7 @@ module TcType (
tcTyConAppTyCon, tcTyConAppTyCon_maybe, tcTyConAppArgs,
tcSplitAppTy_maybe, tcSplitAppTy, tcSplitAppTys, tcRepSplitAppTy_maybe,
tcRepGetNumAppTys,
- tcGetCastedTyVar_maybe, tcGetTyVar_maybe, tcGetTyVar,
+ tcGetCastedTyVar_maybe, tcGetTyVar_maybe, tcGetTyVar, nextRole,
tcSplitSigmaTy, tcSplitNestedSigmaTys, tcDeepSplitSigmaTy_maybe,
---------------------------------
@@ -910,7 +910,7 @@ exactTyCoVarsOfType ty
goCo (UnivCo p _ t1 t2) = goProv p `unionVarSet` go t1 `unionVarSet` go t2
goCo (SymCo co) = goCo co
goCo (TransCo co1 co2) = goCo co1 `unionVarSet` goCo co2
- goCo (NthCo _ co) = goCo co
+ goCo (NthCo _ _ co) = goCo co
goCo (LRCo _ co) = goCo co
goCo (InstCo co arg) = goCo co `unionVarSet` goCo arg
goCo (CoherenceCo c1 c2) = goCo c1 `unionVarSet` goCo c2