3 files changed, 8 insertions, 15 deletions
diff --git a/lib/kernel/src/code_server.erl b/lib/kernel/src/code_server.erl
index fc7ac08699..819554ce74 100644
--- a/lib/kernel/src/code_server.erl
+++ b/lib/kernel/src/code_server.erl
@@ -63,7 +63,10 @@ init(Ref, Parent, [Root,Mode0]) ->
     process_flag(trap_exit, true),
 
     Db = ets:new(code, [private]),
-    foreach(fun (M) -> ets:insert(Db, {M,preloaded}) end, erlang:pre_loaded()),
+    foreach(fun (M) ->
+		    %% Pre-loaded modules are always sticky.
+		    ets:insert(Db, [{M,preloaded},{{sticky,M},true}])
+	    end, erlang:pre_loaded()),
     ets:insert(Db, init:fetch_loaded()),
 
     Mode = 
@@ -988,7 +991,7 @@ try_archive_subdirs(_Archive, Base, []) ->
 %% the complete directory name.
 %%
 del_path(Name0,Path,NameDb) ->
-    case catch to_list(Name0)of
+    case catch filename:join([to_list(Name0)]) of
 	{'EXIT',_} ->
 	    {{error,bad_name},Path};
 	Name ->
diff --git a/lib/kernel/src/file.erl b/lib/kernel/src/file.erl
index 20b703e084..ee2fb85de2 100644
--- a/lib/kernel/src/file.erl
+++ b/lib/kernel/src/file.erl
@@ -117,15 +117,7 @@
 			  | {'time', 'posix'}.
 %%% BIFs
 
--export([file_info/1, native_name_encoding/0]).
-
--spec file_info(Filename) -> {ok, FileInfo} | {error, Reason} when
-      Filename :: name_all(),
-      FileInfo :: file_info(),
-      Reason :: posix() | badarg.
-
-file_info(_) ->
-    erlang:nif_error(undef).
+-export([native_name_encoding/0]).
 
 -spec native_name_encoding() -> latin1 | utf8.
 
diff --git a/lib/kernel/src/kernel.appup.src b/lib/kernel/src/kernel.appup.src
index f8f4cc1ec2..1bae762bed 100644
--- a/lib/kernel/src/kernel.appup.src
+++ b/lib/kernel/src/kernel.appup.src
@@ -17,9 +17,7 @@
 %% %CopyrightEnd%
 {"%VSN%",
  %% Up from - max one major revision back
- [{<<"3\\.0(\\.[0-9]+)*">>,[restart_new_emulator]}, %% R17
-  {<<"2\\.16(\\.[0-9]+)*">>,[restart_new_emulator]}],%% R16
+ [{<<"3\\.0(\\.[0-9]+)*">>,[restart_new_emulator]}], % OTP-17
  %% Down to - max one major revision back
- [{<<"3\\.0(\\.[0-9]+)*">>,[restart_new_emulator]}, %% R17
-  {<<"2\\.16(\\.[0-9]+)*">>,[restart_new_emulator]}] %% R16
+ [{<<"3\\.0(\\.[0-9]+)*">>,[restart_new_emulator]}]  % OTP-17
 }.