libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[carlo]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 1324 bytes --]

>Number:         3655
>Category:       libstdc++
>Synopsis:       Subject: stream bug with "0xBlabla" strings in internal mode
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jul 11 16:56:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Samuel Krempp <krempp@cmla.ens-cachan.fr>
>Release:        3.0 and 3.1
>Organization:
>Environment:
i686-pc-linux-gnu
>Description:
The bug was reproduced with the following g++ :
gcc version 3.1 20010624 (experimental) - cvs
gcc version 3.1 20010707 (experimental) - cvs
gcc version 3.0 20010402 (Debian prerelease)
i686-pc-linux-gnu

and is not present in
gcc version 2.95.4 20010319 (Debian prerelease)

With the faulty compilers, the resulting string looks like :
Trap!ZZZÜø

(the 2 last chars vary, clearly comig from improper memory accesses)

hth,
-- 
Sam
>How-To-Repeat:
#include <cassert>
#include <iostream>
#include <sstream>

int main(){
  using namespace std;
  stringstream oss;
  oss.setf(std::ostream::internal, std::ostream::adjustfield);
  oss.width(10);
  oss.fill('Z');
  oss << "0xTrap!";
  cout << oss.str() << endl;

  assert( oss.str() == "ZZZ0xTrap!" );

}

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:

Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[bkoz]

The following reply was made to PR libstdc++/3655; it has been noted by GNATS.

From: bkoz@gcc.gnu.org
To: bkoz@gcc.gnu.org, carlo@alinoe.com, gcc-bugs@gcc.gnu.org,
  gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, krempp@cmla.ens-cachan.fr
Cc:  
Subject: Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode
Date: 5 Dec 2001 22:31:59 -0000

 Synopsis: Subject: stream bug with "0xBlabla" strings in internal mode
 
 State-Changed-From-To: feedback->closed
 State-Changed-By: bkoz
 State-Changed-When: Wed Dec  5 14:31:59 2001
 State-Changed-Why:
     Fixed, for real this time.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=3655&database=gcc

Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[bkoz]

Synopsis: Subject: stream bug with "0xBlabla" strings in internal mode

State-Changed-From-To: feedback->closed
State-Changed-By: bkoz
State-Changed-When: Wed Dec  5 14:31:59 2001
State-Changed-Why:
    Fixed, for real this time.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=3655&database=gcc

Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[bkoz]

The following reply was made to PR libstdc++/3655; it has been noted by GNATS.

From: bkoz@gcc.gnu.org
To: bkoz@gcc.gnu.org, carlo@alinoe.com, gcc-bugs@gcc.gnu.org,
  gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, krempp@cmla.ens-cachan.fr
Cc:  
Subject: Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode
Date: 29 Nov 2001 00:20:45 -0000

 Synopsis: Subject: stream bug with "0xBlabla" strings in internal mode
 
 State-Changed-From-To: analyzed->feedback
 State-Changed-By: bkoz
 State-Changed-When: Wed Nov 28 16:20:45 2001
 State-Changed-Why:
     The correct output, according to 22.2.2.2, is:
     
     0xZZZTrap!
     
     This is not what you intended, either, but oh well. 
     
     It's fixed in mainline with this:
     
     2001-11-28  Paolo Carlini  <pcarlini@unitus.it>
     
     	libstdc++/3655
     	* include/bits/locale_facets.tcc (__pad): correctly output hex
     	numbers internally aligned.
     	* testsuite/27_io/ostream_inserter_arith.cc: Add testcase.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=3655&database=gcc

Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[bkoz]

Synopsis: Subject: stream bug with "0xBlabla" strings in internal mode

State-Changed-From-To: analyzed->feedback
State-Changed-By: bkoz
State-Changed-When: Wed Nov 28 16:20:45 2001
State-Changed-Why:
    The correct output, according to 22.2.2.2, is:
    
    0xZZZTrap!
    
    This is not what you intended, either, but oh well. 
    
    It's fixed in mainline with this:
    
    2001-11-28  Paolo Carlini  <pcarlini@unitus.it>
    
    	libstdc++/3655
    	* include/bits/locale_facets.tcc (__pad): correctly output hex
    	numbers internally aligned.
    	* testsuite/27_io/ostream_inserter_arith.cc: Add testcase.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=3655&database=gcc

Re: libstdc++/3655: Subject: stream bug with "0xBlabla" strings in internal mode

[bkoz]

Synopsis: Subject: stream bug with "0xBlabla" strings in internal mode

Responsible-Changed-From-To: unassigned->bkoz
Responsible-Changed-By: bkoz
Responsible-Changed-When: Mon Jul 16 12:36:00 2001
Responsible-Changed-Why:
    Mine.
State-Changed-From-To: open->analyzed
State-Changed-By: bkoz
State-Changed-When: Mon Jul 16 12:36:00 2001
State-Changed-Why:
    I've bbeen able to reproduce this. Thanks!

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3655&database=gcc