[Bug c++/45618] New: GCC 4.4.4 strstream and ios::internal flag

[anhtuyen at ca dot ibm dot com]

The following code can be compiled with either g++ (GCC) 4.1.2 or g++ (GCC)
4.4.4.
When running the executable with non-static library, it produces different
output.

The output linked with strstream on g++ (GCC) 4.4.4 seems to be incorrect.

CODE:
/* File name iosflag.C */

#include 
#include 
using namespace std;

int main()
{

char string[1024];

char out_buffer[1024];
strstream io(out_buffer, 1024, ios::in|ios::out);

io.ios::fill('@');
io.flags(ios::internal);
io.width( 10 );
io << (void *) 123 << ' ';
io >> string ;
cout << "String: " << string << endl;
}

COMPILE:
g++ -o iosflag ./iosflag.C

RUN:
./iosflag


EXPECTED RESULTS:
String: @@0x7b

ACTUAL RESULTS:
String: 0x@@7b

NOTE: strstream on g++ (GCC) 4.1.2 produce correct result.


-- 
   Summary: GCC 4.4.4 strstream and ios::internal flag
   Product: gcc
   Version: 4.4.4
Status: UNCONFIRMED
  Severity: normal
  Priority: P3
 Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: anhtuyen at ca dot ibm dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45618

[Bug c++/45618] GCC 4.4.4 strstream and ios::internal flag

[anhtuyen at ca dot ibm dot com]

--- Comment #3 from anhtuyen at ca dot ibm dot com  2010-09-09 20:12 ---
(In reply to comment #2)
> The output seems perfectly fine to me: at the end of Stage 1 we have 0x7b,
> exactly what one gets from printf("%p", (void*)123), per 22.2.2.2.2/12, then,
> per Table 61, padding is added after x, thus 0x@@7b.
> 


Using the ios::internal flags, the format has changed from @@0x7b (gcc
4.1.2) to 0x@@7b (gcc 4.4.4) . One of them must be incorrect, at the very
least.


-- 

anhtuyen at ca dot ibm dot com changed:

   What|Removed |Added

 Status|RESOLVED|UNCONFIRMED
 Resolution|INVALID |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45618