c++/9925: ostrstream (buf, size) << "..." does not work properly

[Pawel dot Pilarczyk at math dot gatech dot edu]

>Number:         9925
>Category:       c++
>Synopsis:       ostrstream (buf, size) << "..." does not work properly
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 03 19:26:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Pawel Pilarczyk
>Release:        gcc version 3.2.2
>Organization:
>Environment:
The environment does not matter - I have the same with DJGPP for DOS, Linux Red Hat (gcc 3.1 and 3.2), and on SUN OS, e.g.:
g++ -v
Reading specs from /usr/local/bin/../lib/gcc-lib/sparc-sun-solaris2.9/3.2.2/specs
Configured with: ../configure --prefix=/usr/local/encap/gcc-3.2.2 --with-gnu-as=/usr/local/bin/as --with-gnu-ld=/usr/local/bin/ld --disable-nls
Thread model: posix
gcc version 3.2.2
>Description:
The code
	char buf [100];
	ostrstream (buf, 100) << "..." << ends;
	cout << buf;
produces output that looks like "0x10d48"
instead of what I expect (namely, "...").

Many other compilers work fine,
e.g. Sun WorkShop C++ Compiler 5.0 or GCC 2.96.
>How-To-Repeat:
#include <iostream.h>
#include <strstream.h>

int main (void)
{
        char buf [100];

        // the following works fine in GCC 2.96 and other
        // compilers, but fails in GCC 3.1 and 3.2
        ostrstream (buf, 100) << "This is OK." << ends;
        cout << buf << endl;

        // the following works fine in any compiler
        ostrstream s (buf, 100);
        s << "This is OK." << ends;
        cout << buf << endl;

        return 0;
} /* main */
>Fix:
To get around the problem, I used the following code instead:
	char buf [100];
	ostrstream s (buf, 100);
	s << "..." << ends;
	cout << buf;
>Release-Note:
>Audit-Trail:
>Unformatted: