[Bug c++/24555] New: Sending output to cout stream sporadically causes segfault

["springmalnachlinks at yahoo dot de" <gcc-bugzilla at gcc dot gnu dot org>]

Used g++ 4.0.2 with accompanying libstdc++ 4.0.2 under SuSE Linux 10 64-bit and
Ubuntu Linux 5.10 32-bit. Using both 64-bit g++ with and without -m32 switch,
as well as 32-bit g++, cout << occasionally produces a segfault which could not
be reproduced under 3.3.5 or various flavors of 3.4. Downgrading to gcc, g++,
cpp and libcstd++ 3.4 under Ubuntu 5.10 solved the problem, under SuSE 10 this
is more difficult.

In the following code, cout produces a segfault in the second do-while loop but
not in the first, although structurally the two are identical:

        do
        {
                os_clear_screen();
                display_message();
                cout << endl << _BOARDSIZESELECT;
                getline(cin,boardsize_entry_string,'\n');
                check_boardsize();
        } while ((boardsize<3)||(boardsize>8));

        do
        {
                os_clear_screen();
                display_message();
                cout << endl << _PLAYERCOUNTSELECT;
                getline(cin,playercount_entry_string,'\n');
                check_playercount();
        } while ((playercount<1)||(playercount>2));

Replacing cout << with calls to printf seems to solve the problem, but passing
variables of type string to printf requires more effort and more time.


-- 
           Summary: Sending output to cout stream sporadically causes
                    segfault
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: springmalnachlinks at yahoo dot de
 GCC build triplet: amd64-pc-linux & i686-pc-linux
  GCC host triplet: amd64-pc-linux & i686-pc-linux
GCC target triplet: amd64-pc-linux & i686-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24555