From 47f61b16efe9f4304a522f54a4b630a6ffc08b06 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org>
Date: Tue, 12 Dec 2017 14:48:50 +0100
Subject: beam_util: Fix bug in is_not_used/3

01835845579e9 fixed some problems, but introduced a bug where
is_not_used/3 would report that a register was not used when it
in fact was.
---
 lib/compiler/test/beam_utils_SUITE.erl | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

(limited to 'lib/compiler/test/beam_utils_SUITE.erl')

diff --git a/lib/compiler/test/beam_utils_SUITE.erl b/lib/compiler/test/beam_utils_SUITE.erl
index 3a07f3923f..d516b0c3c7 100644
--- a/lib/compiler/test/beam_utils_SUITE.erl
+++ b/lib/compiler/test/beam_utils_SUITE.erl
@@ -25,7 +25,7 @@
 	 is_not_killed/1,is_not_used_at/1,
 	 select/1,y_catch/1,otp_8949_b/1,liveopt/1,coverage/1,
          y_registers/1,user_predef/1,scan_f/1,cafu/1,
-         receive_label/1]).
+         receive_label/1,read_size_file_version/1]).
 -export([id/1]).
 
 suite() -> [{ct_hooks,[ts_install_cth]}].
@@ -50,7 +50,8 @@ groups() ->
        y_registers,
        user_predef,
        scan_f,
-       cafu
+       cafu,
+       read_size_file_version
       ]}].
 
 init_per_suite(Config) ->
@@ -445,5 +446,18 @@ do_receive_label(Rec) ->
             do_receive_label(Rec)
     end.
 
+read_size_file_version(_Config) ->
+    ok = do_read_size_file_version({ok,<<42>>}),
+    {ok,7777} = do_read_size_file_version({ok,<<7777:32>>}),
+    ok.
+
+do_read_size_file_version(E) ->
+    case E of
+	{ok,<<Version>>} when Version =:= 42 ->
+            ok;
+	{ok,<<MaxFiles:32>>} ->
+            {ok,MaxFiles}
+    end.
+
 %% The identity function.
 id(I) -> I.
-- 
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