https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69390
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-03-17
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
Known to fail| |5.3.1, 6.3.0, 7.0
--- Comment #3 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed with today's top of trunk (GCC 7.0), 6.x, and 5.x
$ cat t.C && gcc -Wall -Wextra -Wpedantic t.C
struct A { virtual ~A() {}; };
struct B : A {} b;
void g ()
{
A &&ar = static_cast<A&&>(b);
B &&br = dynamic_cast<B&&>(ar);
dynamic_cast<B&&>(static_cast<A&&>(b));
}
t.C: In function ‘void g()’:
t.C:9:23: error: conversion to non-const reference type ‘struct A&’ from rvalue
of type ‘A’ [-fpermissive]
dynamic_cast<B&&>(static_cast<A&&>(b));
^~~~~~~~~~~~~~~~~~~
t.C:7:9: warning: unused variable ‘br’ [-Wunused-variable]
B &&br = dynamic_cast<B&&>(ar);
^~
