Here my stripped version still crashes with segfault:
----<snio>----
#include
#include <iostream>
using namespace boost::spirit;
struct Configurable
{
const char* name; // name of the configurable module
const rule<>& parser; // parser for config items, normally
// a couple of OR-connected terms.
};
rule<> __ = ch_p(' '); // separator char. was a bit more complex
// in the original code
std::string conn, port, ident_name, ident_pw;
/*
// the original parser crashes with segfault:
const Configurable cfg = { "Hardtest",
+(
*__
|
("connect" >> __ >> str_p[assign_a(conn)] >> ':' >>
int_p[assign_a(port)])
|
("identity" >> __ >> str_p[assign_a(ident_name)] >>
__ >> str_p[assign_a(ident_pw)] )
|
"hard"
)
};
*/
// a simplicistic parser that still crashes:
const Configurable cfg = { "Hardtest", +( __ ) };
int main(int argc, char** argv)
{
// original config string:
// "connect foo.bar:123 identity root fF2.oby!sy" or the like.
parse("hard ", cfg.parser); // <--- CRASHES!
// this works:
// parse("hard ", +(__) );
};
----<snap>----
The stack trace of GNU gdb is:
Program received signal SIGSEGV, Segmentation fault.
0x000000000040184e in
boost::spirit::impl::rule_base,
boost::spirit::rule const&, boost::spirit::nil_t,
boost::spirit::nil_t,
boost::spirit::nil_t>::parse_main > >
(this=0x7fff29fcea10, scan=@0x7fff29fcea00)
at /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:189
189 hit = rule_base_access::get(*derived_this)
(gdb) bt
#0 0x000000000040184e in
boost::spirit::impl::rule_base,
boost::spirit::rule const&, boost::spirit::nil_t,
boost::spirit::nil_t,
boost::spirit::nil_t>::parse_main > >
(this=0x7fff29fcea10, scan=@0x7fff29fcea00)
at /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:189
#1 0x00000000004018f7 in
boost::spirit::impl::rule_base,
boost::spirit::rule const&, boost::spirit::nil_t,
boost::spirit::nil_t,
boost::spirit::nil_t>::parse > >
(this=0x7fff29fcea10, scan=@0x7fff29fcea00)
at /usr/include/boost/spirit/core/non_terminal/impl/rule.ipp:171
#2 0x000000000040197b in boost::spirit::parse > (first_=@0x7fff29fcea58, last=@0x7fff29fcea68,
p=@0x7fff29fcea10) at /usr/include/boost/spirit/core/impl/parser.ipp:28
#3 0x0000000000401a34 in boost::spirit::parse >
(str=0x402420 "hard ", p=@0x7fff29fcea10) at
/usr/include/boost/spirit/core/impl/parser.ipp:45
#4 0x0000000000400973 in main (argc=1, argv=0x7fff29fceb88) at
cfgTest.cc:38
I am using boost 1.35 (yes, it is quite old. Is this a bug in boost that
is fixed in newer versions? I didn't found something related in the
changelogs) on Linux x86_64, gcc 4.3.2 (Debian "Lenny").
Perhaps somebody knows an answer except "use spirit 2!" :-)
Lars R.
