--- files/patch-src_array.erl	(revision 0)
+++ files/patch-src_array.erl	(working copy)
@@ -0,0 +1,11 @@ 
+--- src/array.erl.orig	2015-06-24 22:14:48 UTC
++++ src/array.erl
+@@ -155,7 +155,7 @@
+ %% structure and the types of its fields.  So, please make sure that any
+ %% changes to its structure are also propagated to erl_types.erl.
+ %%
+-%% -opaque array() :: #array{}.
++-opaque array() :: #array{}.
+ 
+ %%
+ %% Types
--- files/patch-src_wings.hrl	(revision 0)
+++ files/patch-src_wings.hrl	(working copy)
@@ -0,0 +1,62 @@ 
+--- src/wings.hrl.orig	2015-06-24 22:08:57 UTC
++++ src/wings.hrl
+@@ -113,16 +113,16 @@
+ %% State and records
+ %% Main state record containing all objects and other important state.
+ -record(st,
+-	{shapes=gb_trees:empty() :: gb_tree(),	%All visible objects
++	{shapes=gb_trees:empty() :: gb_trees:tree(),	%All visible objects
+ 	 selmode=face :: sel_mode(),		%Selection mode.
+ 	 sh=false :: boolean(),			%Smart highlighting active.
+ 	 sel=[],				%Current sel: [{Id,GbSet}]
+-	 ssels=gb_trees:empty() :: gb_tree(),   %Saved selections:
++	 ssels=gb_trees:empty() :: gb_trees:tree(),   %Saved selections:
+ 
+ 	 %% Selection only temporary?
+ 	 temp_sel=none :: 'none' | {sel_mode(),boolean()},
+ 
+-	 mat=gb_trees:empty() :: gb_tree(),	%Defined materials (GbTree).
++	 mat=gb_trees:empty() :: gb_trees:tree(),	%Defined materials (GbTree).
+ 	 pal=[],                                %Palette
+ 	 file,					%Current filename.
+ 	 saved=false :: 'false'  | 'true' | 'auto' | integer(),
+@@ -134,7 +134,7 @@
+ 
+ 	 edge_loop=none,			%Previous edge loop.
+ 	 views={0,{}},				%{Current,TupleOfViews}
+-	 pst=gb_trees:empty() :: gb_tree(),     %Plugin State Info
++	 pst=gb_trees:empty() :: gb_trees:tree(),     %Plugin State Info
+ 						%   gb_tree where key is plugin	module 
+ 
+ 	 %% Previous commands.
+@@ -148,7 +148,7 @@
+ 
+ 	 %% Undo information.
+ 	 last_cmd=empty_scene,		        %Last command.
+-	 undo=queue:new() :: queue(),		%Undo (de)queue.
++	 undo=queue:new() :: queue:queue(),	%Undo (de)queue.
+ 	 next_is_undo=true :: boolean(),	%State of undo/redo toggle.
+ 	 undone=[] :: list()		        %States that were undone.
+ 	}).
+@@ -165,14 +165,14 @@
+ 						%  The GbSet contains the
+ 						%  object's selection.
+ 	 name="" :: string() | tuple(),		%Name. (AutoUV stores other things here.)
+-	 es=array:new() :: array(),		%array containing edges
+-	 lv=none :: 'none' | array(),	        %Left vertex attributes
+-	 rv=none :: 'none' | array(),	        %Right vertex attributes,
+-	 fs :: gb_tree(),		        %Faces
+-	 he=gb_sets:empty() :: gb_set(),	%Hard edges
+-	 vc :: array(),		                %Connection info (=incident edge)
++	 es=array:new() :: array:array(),		%array containing edges
++	 lv=none :: 'none' | array:array(),	        %Left vertex attributes
++	 rv=none :: 'none' | array:array(),	        %Right vertex attributes,
++	 fs :: gb_trees:tree(),		        %Faces
++	 he=gb_sets:empty() :: gb_sets:set(),	%Hard edges
++	 vc :: array:array(),		                %Connection info (=incident edge)
+ 						% for vertices.
+-	 vp=array:new() :: array(),		%Vertex positions.
++	 vp=array:new() :: array:array(),		%Vertex positions.
+ 	 pst=gb_trees:empty(),                  %Plugin State Info, 
+ 						%   gb_tree where key is plugin module
+ 	 mat=default,				%Materials.
--- files/patch-src_wings__menu.erl	(revision 0)
+++ files/patch-src_wings__menu.erl	(working copy)
@@ -0,0 +1,11 @@ 
+--- src/wings_menu.erl.orig	2015-06-24 22:22:23 UTC
++++ src/wings_menu.erl
+@@ -43,7 +43,7 @@
+ 	 sel=none :: 'none'|pos_integer(),	%Selected item (1..tuple_size(Menu))
+ 	 sel_side=left :: 'left'|'right',	%Selection on left or right.
+ 	 ns=[],					%Name stack.
+-	 menu :: tuple(menu_item()),		%Normalized menu.
++	 menu,					%Normalized menu.
+ 	 timer=make_ref(),			%Active submenu timer.
+ 	 level=?INITIAL_LEVEL,			%Menu level.
+ 	 type :: 'plain'|'popup',	        %Type of menu.
--- files/patch-src_wings__sel.erl	(revision 0)
+++ files/patch-src_wings__sel.erl	(working copy)
@@ -0,0 +1,11 @@ 
+--- src/wings_sel.erl.orig	2015-06-24 22:25:49 UTC
++++ src/wings_sel.erl
+@@ -122,7 +122,7 @@ mapfold_1(_F, Acc, [], Shs, _St, ShsAcc)
+ -type filter_fun() :: fun((visible_face_num() | edge_num() | vertex_num() | 0,
+ 			   #we{}) -> boolean()).
+ -spec make(filter_fun(), sel_mode(), #st{}) ->
+-    #st{sel::[{non_neg_integer(),gb_set()}]}.
++    #st{sel::[{non_neg_integer(),gb_sets:set()}]}.
+ 
+ make(Filter, Mode, #st{shapes=Shapes}=St) when is_function(Filter, 2) ->
+     Sel0 = gb_trees:values(Shapes),
--- files/patch-src_wings__undo.erl	(revision 0)
+++ files/patch-src_wings__undo.erl	(working copy)
@@ -0,0 +1,17 @@ 
+--- src/wings_undo.erl.orig	2015-06-24 22:27:33 UTC
++++ src/wings_undo.erl
+@@ -30,12 +30,12 @@
+ 	 
+ %% The essential part of the state record.
+ -record(est,
+-	{shapes=[] :: list(#we{}) | gb_tree(),
++	{shapes=[] :: list(#we{}) | gb_trees:tree(),
+ 	 selmode=face :: sel_mode(),
+ 	 sel=[] :: list(),
+ 	 onext=1 :: elem_num(),
+ 	 mat=wings_material:default(),
+-	 pst=gb_trees:empty() :: gb_tree(),
++	 pst=gb_trees:empty() :: gb_trees:tree(),
+ 
+ 	 %% For the Develop menu.
+ 	 cmd,