[Bug c++/67313] New: [6 Regression] ICE: in vague_linkage_p, at cp/decl2.c:1878 with -fno-weak and variadic template

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67313

            Bug ID: 67313
           Summary: [6 Regression] ICE: in vague_linkage_p, at
                    cp/decl2.c:1878 with -fno-weak and variadic template
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---

Created attachment 36236
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36236&action=edit
reduced testcase

Compiler output:
$ gcc -fno-weak testcase.C
testcase.C: In function 'void f() [with <template-parameter-1-1> = {}]':
testcase.C:2:1: internal compiler error: in vague_linkage_p, at cp/decl2.c:1878
 f ()
 ^
0x6ba472 vague_linkage_p(tree_node*)
        /mnt/svn/gcc-trunk/gcc/cp/decl2.c:1878
0x6ba5bb generate_mangling_alias
        /mnt/svn/gcc-trunk/gcc/cp/decl2.c:4361
0xf87820 decl_assembler_name(tree_node*)
        /mnt/svn/gcc-trunk/gcc/tree.c:658
0xfab7a7 assign_assembler_name_if_neeeded(tree_node*)
        /mnt/svn/gcc-trunk/gcc/tree.c:5829
0x915158 cgraph_node::analyze()
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:629
0x918533 analyze_functions
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:1028
0x919050 symbol_table::finalize_compilation_unit()
        /mnt/svn/gcc-trunk/gcc/cgraphunit.c:2477
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r227052 - ICE
5 branch r225803 - OK