From 7bd8cbd8d9127327f3193413458096974972a303 Mon Sep 17 00:00:00 2001
From: Tuncer Ayaz <tuncer.ayaz@gmail.com>
Date: Sat, 31 Mar 2012 19:20:05 +0200
Subject: [PATCH] Make error message more descriptive

---
 src/rebar_core.erl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/rebar_core.erl b/src/rebar_core.erl
index 55e0c4c..9a57437 100644
--- a/src/rebar_core.erl
+++ b/src/rebar_core.erl
@@ -235,7 +235,9 @@ remember_cwd_subdir(Cwd, Subdirs) ->
                             ?DEBUG("Associate sub_dir ~s with ~s~n", [Dir, Cwd]),
                             dict:store(Dir, Cwd, Dict);
                         {ok, Existing} ->
-                            ?ABORT("sub_dir ~s already associated with ~s~n",
+                            ?ABORT("Internal consistency assertion failed.~n"
+                                   "sub_dir ~s already associated with ~s.~n"
+                                   "Duplicate sub_dirs or deps entries?",
                                    [Dir, Existing]),
                             Dict
                     end