https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100827
Bug ID: 100827
Summary: Compiler crash with Boost.Bimap and Boost.Xpressive
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: pdimov at gmail dot com
Target Milestone: ---
I'm seeing a compiler crash with g++ 10/11 in -std=c++03 mode
https://godbolt.org/z/h4dY9oKGc
https://godbolt.org/z/o1P6nrhqG
when compiling one file from the Boost.Bimap test suite:
```
#include <boost/config.hpp>
#include <string>
#include <boost/bimap/bimap.hpp>
#include <boost/xpressive/xpressive.hpp>
#include <boost/xpressive/regex_actions.hpp>
using namespace boost::bimaps;
using namespace boost::xpressive;
namespace xp = boost::xpressive;
int main()
{
//[ code_bimap_and_boost_xpressive
typedef bimap< std::string, int > bm_type;
bm_type bm;
std::string rel_str("one <--> 1 two <--> 2 three <--> 3");
sregex rel = ( (s1= +_w) >> " <--> " >> (s2= +_d) )
[
xp::ref(bm)->*insert( xp::construct<bm_type::value_type>(s1,
as<int>(s2)) )
];
sregex relations = rel >> *(+_s >> rel);
regex_match(rel_str, relations);
assert( bm.size() == 3 );
//]
return 0;
}
```
(https://github.com/boostorg/bimap/blob/03bf1d222914d0c15563414f2e51b6a4ce0e0f69/example/bimap_and_boost/xpressive.cpp)
Trunk no longer has the issue, and neither do earlier versions or language
modes.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94938 looks related, but is
considered fixed in GCC 10.
