https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84447
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-02-18
CC| |msebor at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
Confirmed. Bisected to r251422 (gcc 8.0.0):
r251422 | jason | 2017-08-29 15:40:08 -0400 (Tue, 29 Aug 2017) | 10 lines
Instantiate default arguments/member initializers once.
Prior to that GCC errors out with:
t.C:11:6: error: use of deleted function ‘B::B(T, T) [with T = int][inherited
from A]’
B b(0);
^
t.C:8:12: note: ‘B::B(T, T) [with T = int][inherited from A]’ is implicitly
deleted because the default definition would be ill-formed:
using A::A;
^
t.C:8:12: error: use of deleted function ‘A::A(T, T) [with T = int]’
t.C:3:24: note: declared here
template<typename T> A(T, T = 0) = delete;
^
