Relup instructions order

[Andrew Gopienko]

Erlang R14B01, Ubuntu 10.10 x86 box

gproc.appup file
----------------------------------------------------
%% appup generated for gproc by rebar ("2011/03/10 13:15:09")
{"0.1.1",
   [{"0.01", [{delete_module,gproc_eqc},{update,gproc,{advanced,[]}}]}],
   [{"0.01", []}]
}.

relup file
-------------------------------------------------------
{"0.5.5",
 [{"0.5.4",[],
   [{load_object_code,{gproc,"0.1.1",[gproc]}},
    point_of_no_return,
    {remove,{gproc_eqc,brutal_purge,brutal_purge}},
    {purge,[gproc_eqc]},
    {suspend,[gproc]},
    {load,{gproc,brutal_purge,brutal_purge}},
    {code_change,up,[{gproc,[]}]},
    {resume,[gproc]}]}],
 [{"0.5.4",[],[point_of_no_return]}]}.

After evaluating instruction 'point_of_no_return' the library path updated
to new location and
instruction 'remove' crashed in call
release_handler_1:get_vsn(non_existing=code:which(gproc_eqc)).


release_handler:upgrade_app also crash with same Reason.

(flm@REDACTED)1> code:which(gproc_eqc).
"/home/tdx/devel/fleetm/rel/flm_0.5.4/lib/gproc-0.01/ebin/gproc_eqc.beam"

(flm@REDACTED)2> release_handler:upgrade_app(gproc,
"../flm/lib/gproc-0.1.1").
{'EXIT',{'EXIT',{{badmatch,{error,beam_lib,
                                  {file_error,"non_existing.beam",enoent}}},
                 [{release_handler_1,get_vsn,1},
                  {release_handler_1,add_old_vsn,2},
                  {release_handler_1,eval,2},
                  {lists,foldl,3},
                  {release_handler_1,eval_script,4},
                  {release_handler,eval_appup_script,4},
                  {erl_eval,do_apply,5},
                  {shell,exprs,7}]}}}

(flm@REDACTED)3> code:which(gproc_eqc).
non_existing

After reordering instructions in relup and place 'remove' before
'point_of_no_return' release upgraded successfully.