[Bug libstdc++/30464] New: [regression] -Wconversion triggers warnings for deque<>

[gerald at pfeifer dot com]

Consider the following program:

  #include <deque>

  void f() {
    std::deque<int> d;

    d.push_back(1);
  }

-Wconversion now (as of 2007-01-14) triggers the following warning in
the libstdc++ headers:

/suse/gp/gcc-i686/lib/gcc/i686-suse-linux/4.3.0/../../../../include/c++/4.3.0/bits/deque.tcc:
In member function 'void std::deque<_Tp, _Alloc>::_M_reallocate_map(size_t,
bool) [with _Tp = int, _Alloc = std::allocator<int>]':
/suse/gp/gcc-i686/lib/gcc/i686-suse-linux/4.3.0/../../../../include/c++/4.3.0/bits/stl_deque.h:1520:
  instantiated from 'void std::deque<_Tp,
_Alloc>::_M_reserve_map_at_back(size_t) [with _Tp = int, _Alloc =
std::allocator<int>]'
/suse/gp/gcc-i686/lib/gcc/i686-suse-linux/4.3.0/../../../../include/c++/4.3.0/bits/deque.tcc:308:
  instantiated from 'void std::deque<_Tp, _Alloc>::_M_push_back_aux(const _Tp&)
[with _Tp = int, _Alloc = std::allocator<int>]'
/suse/gp/gcc-i686/lib/gcc/i686-suse-linux/4.3.0/../../../../include/c++/4.3.0/bits/stl_deque.h:1062:
  instantiated from 'void std::deque<_Tp, _Alloc>::push_back(const _Tp&) [with
_Tp = int, _Alloc = std::allocator<int>]'
x.cc:6:   instantiated from here
/suse/gp/gcc-i686/lib/gcc/i686-suse-linux/4.3.0/../../../../include/c++/4.3.0/bits/deque.tcc:714:
warning: conversion to 'size_t' from 'int' may alter its value


-- 
           Summary: [regression] -Wconversion triggers warnings for deque<>
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gerald at pfeifer dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30464