From 774706b15e530fe352cd213908c416d58e10db0e Mon Sep 17 00:00:00 2001
From: Tristan Sloughter <t@crashfast.com>
Date: Wed, 22 Oct 2014 18:26:52 -0500
Subject: output error on bad provider attempting to be added

---
 src/rebar_state.erl | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/rebar_state.erl b/src/rebar_state.erl
index 130f08d..f39251d 100644
--- a/src/rebar_state.erl
+++ b/src/rebar_state.erl
@@ -152,8 +152,13 @@ add_provider(State=#state_t{providers=Providers}, Provider) ->
 
 create_logic_providers(ProviderModules, State0) ->
     lists:foldl(fun(ProviderMod, Acc) ->
-                        {ok, State1} = providers:new(ProviderMod, Acc),
-                        State1
+                        case providers:new(ProviderMod, Acc) of
+                            {error, Reason} ->
+                                ?ERROR(Reason++"~n", []),
+                                Acc;
+                            {ok, State1} ->
+                                State1
+                        end
                 end, State0, ProviderModules).
 
 prepend_hook(State=#state_t{providers=Providers}, Target, Hook) ->
-- 
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