Fix dialyzer errors and warnings

rebar.config

@@ -14,6 +14,10 @@
     deprecated_function_calls
 ]}.
 
+{dialyzer, [{plt_apps, all_deps},
+            {base_plt_apps, [erts, kernel, stdlib, mnesia ]}
+]}.
+
 {profiles,
  [
   {test,

src/mrdb.erl

@@ -559,6 +559,7 @@ rdb_release_batch(H) ->
     rocksdb:release_batch(H).
 
 %% @doc Aborts an ongoing {@link activity/2}
+-spec abort(_) -> no_return().
 abort(Reason) ->
     case mnesia_compatible_aborts() of
 	true ->

src/mrdb_index.erl

@@ -11,9 +11,9 @@
         , index_ref/2
         ]).
 
--record(mrdb_ix_iter, { i    :: mrdb:iterator()
+-record(mrdb_ix_iter, { i    :: mrdb:mrdb_iterator()
                       , type = set :: set | bag
-                      , sub  :: mrdb:ref() | pid()
+                      , sub  :: pid() | mrdb:db_ref()
                       }).
 
 -type ix_iterator() :: #mrdb_ix_iter{}.
@@ -22,7 +22,7 @@
 
 -type object() :: tuple().
 
--record(subst, { i :: mrdb:iterator()
+-record(subst, { i :: mrdb:mrdb_iterator()
                , vals_f
                , cur
                , mref }).
@@ -121,6 +121,7 @@ iterator_move_bag(#mrdb_ix_iter{i = I, sub = Sub}, Dir) ->
             Other
     end.
 
+-spec opt_read(mrdb:ref_or_tab(), Key :: any()) -> any().
 opt_read(R, Key) ->
     case mrdb:read(R, Key, []) of
         [Obj] ->

src/mrdb_mutex.erl

@@ -3,7 +3,9 @@
 
 -export([ do/2 ]).
 
+-ifdef(TEST).
 -include_lib("eunit/include/eunit.hrl").
+-endif.
 
 %% We use a gen_server-based FIFO queue (one queue per alias) to manage the
 %% critical section.