[Bug c++/26029] New: Member initialization by constructor parameter object method calls

[Bug c++/26029] New: Member initialization by constructor parameter object method calls

[Don at Skyler dot com]

//      Expected output is:
//      i_=1

//      In g++ 3.4.4 under cygwin, output is
//      i_=
//      followed by a random integer value
//      (I've seen zero and 97).
//      It appears as though the i_ member is
//      not being initialized.

#include        <iostream>

struct  B1
{
        B1      (int      i  ): i_(i    ) { }
        B1      (const B1 &b1): i_(b1.i_) { }
        int i_;
};

struct  B2
{
        B2      (void)                    { }
};

struct  Initializer
{
        B1      b1(void)        const   {       return  B1(1);  }
        B2      b2(void)        const   {       return  B2( );  }
};

struct  D       :       public  B1,     public  B2
{
        D       (Initializer init): B1(init.b1()), B2(init.b2()) { }
};

int     main    (void)
{
        Initializer init;
        D           d(init);

        std::cout << "i_=" << d.i_ << std::endl;

        return  0;
}


-- 
           Summary: Member initialization by constructor parameter object
                    method calls
           Product: gcc
           Version: 3.4.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Don at Skyler dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] Member initialization by constructor parameter object method calls

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-01-30 13:06 -------
This works for me on 3.4.0 and 4.1.0 on i686-linux-gnu.

Can you give the output of "gcc -v"?


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] Member initialization by constructor parameter object method calls

[pinskia at gcc dot gnu dot org]

-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] Member initialization by constructor parameter object method calls

[brainchild at skyler dot com]

------- Comment #2 from brainchild at skyler dot com  2006-01-30 21:36 -------
The gcc version is 3.4.4, the one in the current Cygwin distribution.

It must have been fixed since then, though.  I downloaded and built gcc 4.0.2
and it gives the correct output, i_=1.  So, I guess you can consider it
resolved.  If it worked on 3.4.0, maybe it was broken between 3.4.0 and 3.4.4,
then fixed between 3.4.4 and 4.0.2?  If so, may be useful info to have on file
for future reference, at least until Cygwin's distribution includes a later
version.

BTW, I am Don@Skyler.com; just posting from work instead of home.

Thanks!


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] Member initialization by constructor parameter object method calls

[brainchild at skyler dot com]

------- Comment #3 from brainchild at skyler dot com  2006-01-30 21:40 -------
Per your request, the --version output:

g++ (GCC) 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] Member initialization by constructor parameter object method calls

[brainchild at skyler dot com]

------- Comment #4 from brainchild at skyler dot com  2006-01-30 21:42 -------
Sorry, just realized that's not what you asked for.  Here is output of gcc -v:

$ ./gcc -v
Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
Configured with: /gcc/gcc-3.4.4/gcc-3.4.4-1/configure --verbose --prefix=/usr
--
exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib
--man
dir=/usr/share/man --infodir=/usr/share/info
--enable-languages=c,ada,c++,d,f77,
java,objc --enable-nls --without-included-gettext
--enable-version-specific-runt
ime-libs --without-x --enable-libgcj --disable-java-awt --with-system-zlib
--ena
ble-interpreter --disable-libgcj-debug --enable-threads=posix
--enable-java-gc=b
oehm --disable-win32-registry --enable-sjlj-exceptions
--enable-hash-synchroniza
tion --enable-libstdcxx-debug : (reconfigured)
Thread model: posix
gcc version 3.4.4 (cygming special) (gdc 0.12, using dmd 0.125)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] [3.4 Regression] Member initialization by constructor parameter object method calls

[pinskia at gcc dot gnu dot org]

------- Comment #5 from pinskia at gcc dot gnu dot org  2006-01-30 22:11 -------
Ok, I have now tried a 3.4.x and also a 3.3.x. and found some interesting
results.

Well it is a regression only in 3.4.1 and above and 3.3.5 and above.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
     Ever Confirmed|0                           |1
           Keywords|                            |wrong-code
      Known to fail|                            |3.3.6 3.4.5
      Known to work|                            |3.4.0 3.3.3
   Last reconfirmed|0000-00-00 00:00:00         |2006-01-30 22:11:57
               date|                            |
            Summary|Member initialization by    |[3.4 Regression] Member
                   |constructor parameter object|initialization by
                   |method calls                |constructor parameter object
                   |                            |method calls
   Target Milestone|---                         |3.4.6


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029

[Bug c++/26029] [3.4 Regression] Member initialization by constructor parameter object method calls

[gdr at gcc dot gnu dot org]

------- Comment #6 from gdr at gcc dot gnu dot org  2006-03-01 05:10 -------
Fixed in 4.0.0 and up.


-- 

gdr at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|3.4.6                       |4.0.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26029