[Bug c++/71833] [4.9/5/6/7 regression] ICE on valid C++11 code with nested variadic templates: tree check: accessed elt 0 of tree_vec with 1 elts in coerce_template_parameter_pack, at cp/pt.c:7439

[jason at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71833

--- Comment #3 from Jason Merrill <jason at gcc dot gnu.org> ---
Author: jason
Date: Mon Jul 25 19:17:43 2016
New Revision: 238734

URL: https://gcc.gnu.org/viewcvs?rev=238734&root=gcc&view=rev
Log:
        PR c++/71833 - member template with two parameter packs

        * pt.c (coerce_template_parameter_pack): Fix logic for
        pack index.

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/cpp0x/variadic-nested1.C
Modified:
    branches/gcc-6-branch/gcc/cp/ChangeLog
    branches/gcc-6-branch/gcc/cp/pt.c