[Bug c++/85215] New: "gcc_assert (!force_elide);" failure

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85215

            Bug ID: 85215
           Summary: "gcc_assert (!force_elide);" failure
           Product: gcc
           Version: 7.3.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dmalcolm at gcc dot gnu.org
  Target Milestone: ---

Created attachment 43847
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43847&action=edit
Reproducer

The downstream bug report:
  https://bugzilla.redhat.com/show_bug.cgi?id=1562194
describes an ICE due to this assertion failing:

8243      gcc_assert (!force_elide);

I'm attaching a minimized reproducer, which ICEs on current trunk (r259106),
with -std=c++1z.

$ ./xg++ -B. -c /tmp/rhbz1562194.cc -std=c++1z 
/tmp/rhbz1562194.cc: In constructor
‘buffer_info::buffer_info(any_container<int>)’:
/tmp/rhbz1562194.cc:17:66: internal compiler error: in build_over_call, at
cp/call.c:8243
   buffer_info(any_container<int> shape_in) : shape(move(shape_in)) {}
                                                                  ^
0x823faa build_over_call
        ../../src/gcc/cp/call.c:8243
0x8298e3 build_new_method_call_1
        ../../src/gcc/cp/call.c:9366
0x829f29 build_new_method_call(tree_node*, tree_node*, vec<tree_node*, va_gc,
vl_embed>**, tree_node*, int, tree_node**, int)
        ../../src/gcc/cp/call.c:9441
0x826f1b build_special_member_call(tree_node*, tree_node*, vec<tree_node*,
va_gc, vl_embed>**, tree_node*, int, int)
        ../../src/gcc/cp/call.c:8969
0x954e20 expand_default_init
        ../../src/gcc/cp/init.c:1887
0x9554a3 expand_aggr_init_1
        ../../src/gcc/cp/init.c:2002
0x954053 build_aggr_init(tree_node*, tree_node*, int, int)
        ../../src/gcc/cp/init.c:1742
0x950227 perform_member_init
        ../../src/gcc/cp/init.c:847
0x9527d3 emit_mem_initializers(tree_node*)
        ../../src/gcc/cp/init.c:1293
0xad0a7c finish_mem_initializers(tree_node*)
        ../../src/gcc/cp/semantics.c:1704
0x9e03b5 cp_parser_mem_initializer_list
        ../../src/gcc/cp/parser.c:14440
0x9dfc74 cp_parser_ctor_initializer_opt
        ../../src/gcc/cp/parser.c:14353
0x9eeb48 cp_parser_ctor_initializer_opt_and_function_body
        ../../src/gcc/cp/parser.c:21803
0x9f9053 cp_parser_function_definition_after_declarator
        ../../src/gcc/cp/parser.c:26839
0x9fb8dc cp_parser_late_parsing_for_member
        ../../src/gcc/cp/parser.c:27719
0x9f141a cp_parser_class_specifier_1
        ../../src/gcc/cp/parser.c:22757
0x9f14f7 cp_parser_class_specifier
        ../../src/gcc/cp/parser.c:22783
0x9e43a8 cp_parser_type_specifier
        ../../src/gcc/cp/parser.c:16766
0x9de948 cp_parser_decl_specifier_seq
        ../../src/gcc/cp/parser.c:13617
0x9dd071 cp_parser_simple_declaration
        ../../src/gcc/cp/parser.c:12927
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with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
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