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Diffstat (limited to 'compiler/GHC/Tc/Deriv.hs')
| -rw-r--r-- | compiler/GHC/Tc/Deriv.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Tc/Deriv.hs b/compiler/GHC/Tc/Deriv.hs index 272d7b6d4e..f191f74d46 100644 --- a/compiler/GHC/Tc/Deriv.hs +++ b/compiler/GHC/Tc/Deriv.hs @@ -1920,7 +1920,7 @@ genFamInsts spec@(DS { ds_tvs = tyvars, ds_mechanism = mechanism -- See Note [DeriveAnyClass and default family instances] DerivSpecAnyClass -> do let mini_env = mkVarEnv (classTyVars clas `zip` inst_tys) - mini_subst = mkTvSubst (mkInScopeSet (mkVarSet tyvars)) mini_env + mini_subst = mkTvSubst (mkInScopeSetList tyvars) mini_env dflags <- getDynFlags tyfam_insts <- -- canDeriveAnyClass should ensure that this code can't be reached |