From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 .../test/compilation_SUITE_data/otp_4790.erl       | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 lib/compiler/test/compilation_SUITE_data/otp_4790.erl

(limited to 'lib/compiler/test/compilation_SUITE_data/otp_4790.erl')

diff --git a/lib/compiler/test/compilation_SUITE_data/otp_4790.erl b/lib/compiler/test/compilation_SUITE_data/otp_4790.erl
new file mode 100644
index 0000000000..130ee44e80
--- /dev/null
+++ b/lib/compiler/test/compilation_SUITE_data/otp_4790.erl
@@ -0,0 +1,63 @@
+%%
+%% %CopyrightBegin%
+%% 
+%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%% 
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% %CopyrightEnd%
+%%
+-module(otp_4790).
+
+-export([?MODULE/0]).
+
+?MODULE() ->
+    pan_test().
+
+
+% --------------------------- OTP Ticket --------------------------------
+% *Id: 		OTP-4790
+% *Notes:	In the code below, the compiler incorrectly assumes
+% 		wings_pref:get_value(pan_speed) returns a float,
+% 		causing a crash at run-time.
+
+% 		The same error could cause tuple tests to be removed,
+% 		but that would propbably only cause a crash if the
+% 		Erlang code was incorrect or if it depended on a catch
+% 		to catch exceptions. Therefore, I consider it unlikely
+% 		that Erlang programs that don't use floating point
+% 		arithmetic are likely to be bitten by this bug.
+% -----------------------------------------------------------------------
+
+-record(view, {pan_x,pan_y,distance}).
+
+pan_test() ->
+    pan(13, 3).
+
+pan(Dx0, Dy0) ->
+    #view{pan_x=PanX0,pan_y=PanY0,distance=D} = View = current(),
+    S = D*(1/8)/(51-pref_get_value(pan_speed)),
+    Dx = Dx0*S,
+    Dy = Dy0*S,
+    PanX = PanX0 + Dx,
+    PanY = PanY0 - Dy,
+    set_current(View#view{pan_x=PanX,pan_y=PanY}).
+
+current() ->
+    #view{pan_x=2.0,pan_y=9.75,distance=25.3}.
+
+set_current(#view{pan_x=X,pan_y=Y,distance=D})
+  when is_float(X), is_float(Y), is_float(D) ->
+    io:format("X=~p Y=~p D=~p\n", [X,Y,D]).
+
+pref_get_value(pan_speed) ->
+    32.
-- 
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