lexical_cast problem with OS X gcc -fast option

23 Mar 2006

      If I compile the following code (test.cc):

#include <iostream>
#include <string>

#include "boost/lexical_cast.hpp"

int main() {

	int i;
	std::string s("3");

	try {

		i = boost::lexical_cast<int>(s);

	} catch (boost::bad_lexical_cast& e) {
		std::cerr << "Error in conversion\n";
	}
}

with the "-fast" and "-mcpu=G4" options for gcc 3.3 on MacOS X 10.4.5, like so:

g++ -I. -ggdb -fast -mcpu=G4 test.cc -o test

I get a Bus error when I run the compiled program.  I do not get this
error when I omit the "-fast -mcpu=G4" options.  Here is the trace
from gdb:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x00017d44 in std::locale::operator= () at test.cc:11
11      }
(gdb) backtrace
#0  0x00017d44 in std::locale::operator= () at test.cc:11
#1  0x00019e54 in std::ios_base::_M_init () at test.cc:11
#2  0x0001a8c0 in std::basic_ios::init
() at test.cc:11
#3  0x0004b30c in boost::detail::lexical_stream::lexical_stream (this=0xbffff6f0) at
/usr/include/gcc/darwin/3.3-fast/c++/istream:98
#4  0x0004aed8 in boost::lexical_cast
(arg=@0xbffff9e0) at boost/lexical_cast.hpp:135
#5  0x000028e8 in main () at test.cc:10

Any help with this would be greatly appreciated.  Thanks!

Colin Dewey

David Abrahams

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