where
-- (It may seem a bit crude to compare the error messages,
-- but it makes sure that we combine just what the user sees,
where
-- (It may seem a bit crude to compare the error messages,
-- but it makes sure that we combine just what the user sees,
(insts2, overlaps) = partitionWith (check_overlap inst_envs) insts1
(eqInsts, insts3) = partition isEqInst insts2
; traceTc (text "reportNoInstances" <+> vcat
(insts2, overlaps) = partitionWith (check_overlap inst_envs) insts1
(eqInsts, insts3) = partition isEqInst insts2
; traceTc (text "reportNoInstances" <+> vcat
; mapM_ complain_implic implics
; mapM_ (\doc -> addErrTcM (tidy_env, doc)) overlaps
; groupErrs complain_no_inst insts3
; mapM_ complain_implic implics
; mapM_ (\doc -> addErrTcM (tidy_env, doc)) overlaps
; groupErrs complain_no_inst insts3