fix sys:get_status backward compatibility for sasl release_handler_1

In R13B04 sys:get_status was modified to invoke format_status/2 in the
callback module if the module exports that function. This resulted in
a change to the term returned from calling sys:get_status on the
supervisor module, since supervisor is a gen_server and gen_server
exports format_status. The sasl release_handler_1 module had a
dependency on the pre-R13B04 term returned by sys:get_status when
invoked on a supervisor, so the R13B04 change broke that dependency.

Change release_handler_1 to handle both the pre-R13B04 and R13B04
terms that sys:get_status can return from a supervisor.

1 files changed, 7 insertions, 1 deletions

diff --git a/lib/sasl/src/release_handler_1.erl b/lib/sasl/src/release_handler_1.erl
index e3e3caba99..e2c37e4bf4 100644
--- a/lib/sasl/src/release_handler_1.erl
+++ b/lib/sasl/src/release_handler_1.erl
@@ -554,7 +554,13 @@ get_supervisor_module(SupPid) ->
 get_supervisor_module1(SupPid) ->
     {status, _Pid, {module, _Mod}, 
      [_PDict, _SysState, _Parent, _Dbg, Misc]} = sys:get_status(SupPid),
-    [_Name, State, _Type, _Time] = Misc,
+    %% supervisor Misc field changed at R13B04, handle old and new variants here
+    State = case Misc of
+                [_Name, State1, _Type, _Time] ->
+                    State1;
+                [_Header, _Data, {data, [{"State", State2}]}] ->
+                    State2
+            end,
     %% Cannot use #supervisor_state{module = Module} = State.
     {ok, element(#supervisor_state.module, State)}.