[Bug c++/82085] [6 Regression] ICE: Template variable reference used in nested template alias

[rbock at eudoxos dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82085

--- Comment #8 from Roland B <rbock at eudoxos dot de> ---
(In reply to Paolo Carlini from comment #7)
> Fixed trunk and 7.3.0 so far.

Awesome!

Sadly, my "real" code still produces an internal compile error. I will try to
create a new minimal example.

Until then, you can observe the code here:
https://github.com/rbock/sqlpp17/tree/1c424f9c1e4d9d9fa7e1c0cb48d27aec190f0da7

And then something like:
export SOURCE_ROOT=$HOME/projects/sqlpp17
/usr/local/gcc-trunk/bin/g++    -I$SOURCE_ROOT/include -I$SOURCE_ROOT/tests 
-std=c++1z -Wall -Wpedantic $SOURCE_ROOT/tests/serialize/join.cpp

This creates:
sqlpp17/char_sequence.h:70:80: internal compiler error: unexpected expression
‘N’ of kind template_parm_index
   using make_char_sequence_t = typename
make_char_sequence<StringLiteral>::type;
                                                                               
^
0x6bd33a cxx_eval_constant_expression
        ../../gcc-trunk/gcc/cp/constexpr.c:4638
...