Your message dated Tue, 24 Jun 2008 00:18:02 +0200
with message-id <[EMAIL PROTECTED]>
and subject line Re: warning: will never be executed
has caused the Debian Bug report #487075,
regarding warning: will never be executed
to be marked as done.
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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
487075: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=487075
Debian Bug Tracking System
Contact [EMAIL PROTECTED] with problems
--- Begin Message ---
Package: libstdc++6-4.1-dev in etch of architecture i386
When compiling programs which use
"/usr/include/c++/4.1.2/bits/streambuf_iterator.h" with gcc, and including the
flag "-Wunreachable-code", the compiler informs me that the header file
contains unreachable code. Now I know this is not an "error", but maybe one
could optimize the code found in the header based on the compilers suggestions.
I am using:
Linux 2.6.18-6-686 i686 GNU/Linux (Debian Etch)
Sample code (taken from
"http://www2.roguewave.com/support/docs/leif/sourcepro/html/stdlibref/istreambuf-iterator.html";):
//
// istreambuf_iterator.cpp
//
#include <iostream> // for cout, endl
#include <fstream> // for ofstream, istreambuf_iterator
#include <stdio.h> // for tmpnam () and remove ()
int main ( )
{
// create a temporary filename
const char *fname = tmpnam (0);
if (!fname)
return 1;
// open the file is_iter.out for reading and writing
std::ofstream out (fname, std::ios::out | std::ios::in |
std::ios::trunc);
// output the example sentence into the file
out << "Ceci est un simple exemple pour démontrer le\n"
"fonctionnement de istreambuf_iterator.";
// seek to the beginning of the file
out.seekp (0);
// construct an istreambuf_iterator pointing to
// the ofstream object underlying streambuffer
std::istreambuf_iterator<char, std::char_traits<char> >
iter (out.rdbuf ());
// construct an end of stream iterator
const std::istreambuf_iterator<char,
std::char_traits<char> > end;
std::cout << std::endl;
// output the content of the file
while (!iter.equal (end)) {
// use both operator++ and operator*
std::cout << *iter++;
}
std::cout << std::endl;
// remove temporary file
remove (fname);
return 0;
}
Sample compiling run:
g++ -Wunreachable-code -o prog main.cpp
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream: In
constructor ‘std::basic_ofstream<_CharT, _Traits>::basic_ofstream(const
char*, std::_Ios_Openmode) [with _CharT = char, _Traits =
std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:573:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:573:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:573:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:573:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:575:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:576:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/basic_ios.h:
In constructor ‘std::basic_ios<_CharT, _Traits>::basic_ios() [with
_CharT = char, _Traits = std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/basic_ios.h:447:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream: In
constructor ‘std::basic_ostream<_CharT, _Traits>::basic_ostream() [with
_CharT = char, _Traits = std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:341:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:341:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:341:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:341:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:341:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream: In
destructor ‘std::basic_ostream<_CharT, _Traits>::~basic_ostream() [with
_CharT = char, _Traits = std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:113:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:113:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/ostream:113:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/streambuf_iterator.h:
In constructor ‘std::istreambuf_iterator<_CharT,
_Traits>::istreambuf_iterator(std::basic_streambuf<_CharT, _Traits>*) [with
_CharT = char, _Traits = std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/streambuf_iterator.h:87:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/streambuf_iterator.h:
In constructor ‘std::istreambuf_iterator<_CharT,
_Traits>::istreambuf_iterator() [with _CharT = char, _Traits =
std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/bits/streambuf_iterator.h:79:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream: In
destructor ‘std::basic_ofstream<_CharT, _Traits>::~basic_ofstream() [with
_CharT = char, _Traits = std::char_traits<char>]’:
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:586:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:586:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:586:
warning: will never be executed
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../include/c++/4.1.2/fstream:586:
warning: will never be executed
/tmp/ccqvH2F0.o: In function `main':
main.cpp:(.text+0x8f): warning: the use of `tmpnam' is dangerous, better use
`mkstemp'
--- End Message ---
--- Begin Message ---
tag 487075 + wontfix
tag 487075 + fixed-upstream
thanks
this is fixed in GCC-4.3, which is the default for lenny on most
architectures.
--- End Message ---
