[Issue 7335] New: sometimes the OUT - block have undefined class members-acces
d-bugmail at puremagic.com
d-bugmail at puremagic.com
Sat Jan 21 09:21:38 PST 2012
http://d.puremagic.com/issues/show_bug.cgi?id=7335
Summary: sometimes the OUT - block have undefined class
members-acces
Product: D
Version: D2
Platform: x86_64
OS/Version: Linux
Status: NEW
Severity: critical
Priority: P2
Component: DMD
AssignedTo: nobody at puremagic.com
ReportedBy: devbai at mnet-mail.de
--- Comment #0 from Devbai <devbai at mnet-mail.de> 2012-01-21 09:21:35 PST ---
Hallo,
there are possible situations, that the OUT-Block of a methode
have not the 'exact' value of a member. With other words the members
seem to be undefiend.
The following programm show to situations. One them the OUT-block
have correct acces to the member - onother withot the correct
values.
here the programm:
**************
import std.stdio;
class BasisClass
{
protected int mValue = 10;
public void setValue( int newValue)
in
{ writeln("checking IN BasisClass.setValue (do Nothing)");
}
out
{ writeln("checking OUT BasisClass.setValue (value : " , mValue, ")");
assert(mValue < 100 && mValue > -100); // <= assert will pass; because
the use newValue in the in-block
writeln(" ... passed");
}
body
{ mValue = newValue;
}
}
class SubClassA : BasisClass
{
override
public void setValue( int newValue)
in
{ // will not checked because super.IN-check will pass
writeln("checking IN SubClassA.setValue (do Nothing)");
}
out
{ writeln("checking OUT SubClassA.setValue (value : " , mValue, ")");
}
body
{ mValue = newValue;
}
}
class SubClassB : BasisClass
{
override
public void setValue( int newValue)
in
{ // will not checked because super.IN-check will pass
writeln("checking IN SubClassB.setValue (do Nothing)");
int a = newValue; //<<<<<<<<<<<< The only diffrence to SubClassA
}
out
{ writeln("checking OUT SubClassB.setValue (mValue : " , mValue, ")");
}
body
{ mValue = newValue;
}
}
public static void main ()
{
writeln("*** START ***");
writeln("\nSubClass A:");
BasisClass aObject = new SubClassA();
aObject.setValue(3);
writeln("\nSubClass B:");
BasisClass bObject = new SubClassB();
bObject.setValue(3); // <<<<< will crash because undefinet mValue in the
// BasisClass.setValue().out-block.
writeln("\n*** END ***");
}
**************
compilee with DMD64 D Compiler v2.057
will show this output:
**************
core.exception.AssertError at TestAppBugNoMembersInOutBlock(13): Assertion failure
----------------
./(_d_assertm+0x2a) [0x44830a]
./() [0x444e3a]
./(void TestAppBugNoMembersInOutBlock.BasisClass.setValue(int).void
__ensure()+0x4d) [0x444c0d]
./(void TestAppBugNoMembersInOutBlock.SubClassB.setValue(int)+0x48) [0x444d14]
./(_Dmain+0x7f) [0x444e07]
./(extern (C) int rt.dmain2.main(int, char**).void runMain()+0x17) [0x44893f]
./(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void
delegate())+0x2a) [0x4484e6]
./(extern (C) int rt.dmain2.main(int, char**).void runAll()+0x42) [0x448992]
./(extern (C) int rt.dmain2.main(int, char**).void tryExec(scope void
delegate())+0x2a) [0x4484e6]
./(main+0xd3) [0x448477]
/lib/libc.so.6(__libc_start_main+0xfe) [0x7f85995ecd8e]
----------------
*** START ***
SubClass A:
checking IN BasisClass.setValue (do Nothing)
checking OUT BasisClass.setValue (value : 3)
... passed
checking OUT SubClassA.setValue (value : 3)
SubClass B:
checking IN BasisClass.setValue (do Nothing)
checking OUT BasisClass.setValue (value : 1074641200)
**************
as seen the ClassB-Out don't have correct acces to the member
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