Uninitialized variable usage warning broken

[Ben Gamari]

Binary package hint: gcc-4.4

Compiling the attached testcase should produce a warning, as it does with g++
4.3.2 (at least with -O or above),

  $ g++-4.3 -Wall -Wextra -pedantic -ansi -O3 hi.cpp
  /usr/include/bits/stdio2.h: In function ‘int main()’:
  /usr/include/bits/stdio2.h:105: warning: ‘hi.array<double, 4>::a[1]’ is used
  uninitialized in this function
  hi.cpp:29: note: ‘hi.array<double, 4>::a[1]’ was declared here
  $

On g++ 4.4.1, however, the compiler produces no warning,

  $ g++ -Wall -Wextra -pedantic -ansi -O3 hi.cpp
  $

$ g++ -v
Using built-in specs.
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.4.1-1ubuntu3'
--with-bugurl=file:///usr/share/doc/gcc-4.4/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --enable-shared
--enable-multiarch --enable-linker-build-id --with-system-zlib
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.4 --program-suffix=-4.4 --enable-nls
--enable-clocale=gnu --enable-libstdcxx-debug --enable-mpfr --enable-objc-gc
--disable-werror --with-arch-32=i486 --with-tune=generic
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 4.4.1 (Ubuntu 4.4.1-1ubuntu3)

[Ben Gamari (bgamari)]

It seems that this is an Ubuntu-specific bug. It was originally reported in the gcc bugzilla as #41135 (http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41135).

[Matthias Klose (doko)]

not seen anymore with 4.4.1-4ubuntu1 in karmic