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Date: Mon, 23 Dec 2002 07:56:00 -0000
From: O.Kullmann@Swansea.ac.uk
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Subject: c++/9042: Initialisation of std::ostringstream does not work correctly
X-SW-Source: 2002-12/txt/msg01236.txt.bz2
List-Id: <gcc-prs.sourceware.org>


>Number:         9042
>Category:       c++
>Synopsis:       Initialisation of std::ostringstream does not work correctly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Mon Dec 23 07:56:29 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Oliver Kullmann
>Release:        g++ -v
>Organization:
>Environment:
Linux, Suse 8.0
 g++ -v
Reading specs from /opt/experimental/lib/gcc-lib/i486-suse-linux/3.0.4/specs
Configured with: ../configure --enable-threads=posix --enable-long-long --prefix=/opt/experimental
+--with-local-prefix=/usr/local --enable-languages=c,c++,f77,objc,java --disable-nls --enable-shared
+i486-suse-linux
Thread model: posix
gcc version 3.0.4 (SuSE)
>Description:
#include <sstream>
#include <iostream>

int main() {
  std::ostringstream s("abcd", std::ios_base::app);
  s << "xy";
  std::cout << s.str() << "\n";
  // outputs "xycd" (instead of the correct "abcdxy")
}
>How-To-Repeat:
compile and run;
>Fix:
Use only the default constructor of std::ostringstream,
and then use the inserter.
>Release-Note:
>Audit-Trail:
>Unformatted:
 Reading specs from /opt/experimental/lib/gcc-lib/i486-suse-linux/3.0.4/specs
 Configured with: ../configure --enable-threads=posix --enable-long-long --prefix=/opt/experimental
 +--with-local-prefix=/usr/local --enable-languages=c,c++,f77,objc,java --disa