diff options
Diffstat (limited to 'compiler/typecheck/TcValidity.hs')
| -rw-r--r-- | compiler/typecheck/TcValidity.hs | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/compiler/typecheck/TcValidity.hs b/compiler/typecheck/TcValidity.hs index 56cb348669..b018b52994 100644 --- a/compiler/typecheck/TcValidity.hs +++ b/compiler/typecheck/TcValidity.hs @@ -684,7 +684,8 @@ check_valid_theta _ _ [] = return () check_valid_theta env ctxt theta = do { dflags <- getDynFlags - ; warnTcM (wopt Opt_WarnDuplicateConstraints dflags && + ; warnTcM Opt_WarnDuplicateConstraints + (wopt Opt_WarnDuplicateConstraints dflags && notNull dups) (dupPredWarn env dups) ; traceTc "check_valid_theta" (ppr theta) ; mapM_ (check_pred_ty env dflags ctxt) theta } @@ -1455,7 +1456,7 @@ checkValidCoAxiom ax@(CoAxiom { co_ax_tc = fam_tc, co_ax_branches = branches }) -- (b) failure of injectivity check_branch_compat prev_branches cur_branch | cur_branch `isDominatedBy` prev_branches - = do { addWarnAt (coAxBranchSpan cur_branch) $ + = do { addWarnAt' (coAxBranchSpan cur_branch) $ inaccessibleCoAxBranch ax cur_branch ; return prev_branches } | otherwise |