[Bug c++/36866] New: lack of warning when initializing a class member from an uninitialized variable

[Bug c++/36866] New: lack of warning when initializing a class member from an uninitialized variable

[pentek dot imre at gmail dot com]

Hello, the attached code compiles without any warning when compiled with the
command
g++ -W -Wall any.cpp -c -o any.o
but x gets initialised from itself, actually dereferencing x prior to
initializing it. At this point it is trivial that x wasn't initialised.




Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with: /var/tmp/portage/sys-devel/gcc-4.1.2/work/gcc-4.1.2/configure
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.1.2
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.2
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.2/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.1.2/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.1.2/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--enable-nls --without-included-gettext --with-system-zlib --disable-checking
--disable-werror --enable-secureplt --enable-multilib --enable-libmudflap
--disable-libssp --enable-java-awt=gtk
--enable-languages=c,c++,java,treelang,fortran --enable-shared
--enable-threads=posix --enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.1.2 (Gentoo 4.1.2 p1.1)


-- 
           Summary: lack of warning when initializing a class member from an
                    uninitialized variable
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pentek dot imre at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36866

[Bug c++/36866] lack of warning when initializing a class member from an uninitialized variable

[pentek dot imre at gmail dot com]

------- Comment #1 from pentek dot imre at gmail dot com  2008-07-17 19:16 -------
Created an attachment (id=15925)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=15925&action=view)
any.cpp


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36866

[Bug c++/36866] lack of warning when initializing a class member from an uninitialized variable

[manu at gcc dot gnu dot org]

------- Comment #2 from manu at gcc dot gnu dot org  2008-07-21 14:30 -------
To fix this testcase we would need to fix a few of the -Wuninitialized issues,
since -Wuninitialized does not work without optimisation, we don't handle VOPs
(no -Wunitialized for pointers then), and -Winit-self is broken for some cases.
Nonetheless, fixing PR19808 would be a start.

*** This bug has been marked as a duplicate of 19808 ***


-- 

manu at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu dot org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36866