[Boost-bugs] [Boost C++ Libraries] #11751: variant of non-const references fails equality compare

Subject: [Boost-bugs] [Boost C++ Libraries] #11751: variant of non-const references fails equality compare
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-10-23 18:59:31

#11751: variant of non-const references fails equality compare
------------------------+------------------------------
 Reporter:  nikkoara@…  |       Type:  Bugs
   Status:  new         |  Milestone:  To Be Determined
Component:  None        |    Version:  Boost 1.59.0
 Severity:  Problem     |   Keywords:  variant
------------------------+------------------------------
 The following aborts:

 {{{#!c++
 #include <boost/variant.hpp>

 using variant_type = boost::variant< int& >;

 int main () {
     int a, b;

     variant_type v (a), u (b);
     v == u;

     return 0;
 }
 }}}

 Compile and run:

 {{{
 $ g++ -std=c++14 -I/opt/boost/default/include t.cpp && ./a.out
 a.out:
 /opt/boost/default/include/boost/variant/detail/forced_return.hpp:39: T
 boost::detail::variant::forced_return() [with T = const int&]: Assertion
 `false' failed.
 Aborted (core dumped)
 }}}

 It seems that the cause is the instantiation of known_get for const T at
 line 905 in variant.hpp (1.59.0).

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/11751>
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