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digitalmars.D.bugs - Bug from cpuid wrapper thread in D.announce: char[12] str = "";

reply notknown <notknown none.com> writes:
 From the cpuid wrapper thread in D.annoucments.

Tomas Lindquist Olsen:

 Do you think you could narrow this down? Seems it's not happening for
 Windows users. Might as well report it if it's a real bug.

 Basically some testing of class member initialisers.


Okay, I narrowed it down as much as I could to this little test.

bug.d:
[code]
module bug;

import std.stdio;

class Bug
{
   char[12] str = "";
   uint t = 1;
}

class NoBug
{
   uint t = 1;
   char[12] str = "";
}

class NoBug2
{
   char[12] str;
   uint t = 1;
}

void main()
{
   auto b = new Bug;
   auto n = new NoBug;
   auto n2 = new NoBug2;

   writefln("bug %d", b.t);
   writefln("nobug %d", n.t);
   writefln("nobug2 %d", n2.t);
}
[/code]

$dmd -w bug.d
gcc bug.o -o bug -m32 -lphobos -lpthread -lm

$./bug.d
bug 0
nobug 1
nobug2 1

Digital Mars D Compiler v0.172
I run on Ubuntu Kernel 2.6.15-27-k7

Hope that helps.
Oct 26 2006
parent Thomas Kuehne <thomas-dloop kuehne.cn> writes:
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Hash: SHA1

notknown schrieb am 2006-10-26:

  From the cpuid wrapper thread in D.annoucments.

 Tomas Lindquist Olsen:

 Do you think you could narrow this down? Seems it's not happening for
 Windows users. Might as well report it if it's a real bug.

 Basically some testing of class member initialisers.


 Okay, I narrowed it down as much as I could to this little test.

 bug.d:
 [code]
 module bug;

 import std.stdio;

 class Bug
 {
    char[12] str = "";
    uint t = 1;
 }

 class NoBug
 {
    uint t = 1;
    char[12] str = "";
 }

 class NoBug2
 {
    char[12] str;
    uint t = 1;
 }

 void main()
 {
    auto b = new Bug;
    auto n = new NoBug;
    auto n2 = new NoBug2;

    writefln("bug %d", b.t);
    writefln("nobug %d", n.t);
    writefln("nobug2 %d", n2.t);
 }
 [/code]

 $dmd -w bug.d
 gcc bug.o -o bug -m32 -lphobos -lpthread -lm

 $./bug.d
 bug 0
 nobug 1
 nobug2 1

 Digital Mars D Compiler v0.172
 I run on Ubuntu Kernel 2.6.15-27-k7

 Hope that helps.


Added to DStress as
http://dstress.kuehne.cn/run/o/odd_bug_10_A.d
http://dstress.kuehne.cn/run/o/odd_bug_10_B.d
http://dstress.kuehne.cn/run/o/odd_bug_10_C.d

Thomas


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Nov 23 2006