id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
6182	lexical_cast: invalid application of 'sizeof' to incomplete type 'removed_ptr_t'	pmachata@…	Antony Polukhin	"This is triggered by use of incomplete types, as in the following code:

{{{
#include <boost/lexical_cast.hpp>
#include <iostream>
struct ble;
typedef struct ble *meh;
std::ostream &
operator <<(std::ostream &o, meh m) {
  o << ""yay"";
}
int main(int argc, char *argv[]) {
  meh heh;
  std::cout << boost::lexical_cast<std::string>(heh) << std::endl;
}
}}}

This used to work as expected with boost 1.46.1.  With boost 1.48.0, the compilation fails with the following message:

{{{
In file included from x.cc:1:0:
/usr/include/boost/lexical_cast.hpp: In static member function 'static Target boost::detail::lexical_cast_do_cast<Target, Source>::lexical_cast_impl(const Source&) [with Target = std::basic_string<char>, Source = ble*]':
/usr/include/boost/lexical_cast.hpp:1916:50:   instantiated from 'Target boost::lexical_cast(const Source&) [with Target = std::basic_string<char>, Source = ble*]'
x.cc:16:52:   instantiated from here
/usr/include/boost/lexical_cast.hpp:1742:25: error: invalid application of 'sizeof' to incomplete type 'removed_ptr_t {aka ble}' 
}}}

The compiler used is GCC 4.6.1, and I imagine that others would be impacted, too."	Bugs	closed	To Be Determined	lexical_cast	Boost 1.48.0	Regression	fixed