[Bug c++/71833] [4.9/5 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

Jason Merrill <jason at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[4.9/5/6/7 regression] ICE  |[4.9/5 regression] ICE on
                   |on valid C++11 code with    |valid C++11 code with
                   |nested variadic templates:  |nested variadic templates:
                   |tree check: accessed elt 0  |tree check: accessed elt 0
                   |of tree_vec with 1 elts in  |of tree_vec with 1 elts in
                   |coerce_template_parameter_p |coerce_template_parameter_p
                   |ack, at cp/pt.c:7439        |ack, at cp/pt.c:7439

--- Comment #4 from Jason Merrill <jason at gcc dot gnu.org> ---
Fixed for 6.2/7 so far.