[Bug bootstrap/97118] New: [11 Regression] r11-3274 breaks bootstrap

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97118

            Bug ID: 97118
           Summary: [11 Regression] r11-3274 breaks bootstrap
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: jason at redhat dot com
  Target Milestone: ---

On Linux/x86:

commit f627125855075f7ffde74e48481ee961f0bc4c7b
Author: Jason Merrill <jason@redhat.com>
Date:   Fri Sep 4 12:14:19 2020 -0400

    c++: Layout decls with newly-complete type.

    Martin's -Wplacement-new patch ran into a problem with DECL_SIZE not being
    set on an extern variable for which the type was not complete until after
    its declaration.  complete_vars was deliberately not calling layout_decl
for
    some reason, instead leaving that for expand_expr_real_1 much later in the
    compilation.  But if we layout decls at declaration time, I don't see any
    reason we shouldn't lay them out here, when their type is newly complete.

    gcc/cp/ChangeLog:

            * decl.c (complete_vars): Call layout_var_decl.

cause:

../../src-master/gcc/coretypes.h: In instantiation of ??struct
kv_pair<optgroup_flag>??:
../../src-master/gcc/dumpfile.c:169:50:   required from here
../../src-master/gcc/dumpfile.c:169:33: error: storage size of
??optgroup_options?? isn??t known
  169 | const kv_pair<optgroup_flags_t> optgroup_options[] =
      |                                 ^~~~~~~~~~~~~~~~
../../src-master/gcc/dumpfile.c: In function ??void dump_loc(dump_flags_t,
pretty_printer*, location_t)??:
../../src-master/gcc/dumpfile.c:498:34: warning: spurious trailing space in
format [-Wformat-diag]
  498 |         pp_printf (pp, "%s:%d:%d: ", LOCATION_FILE (loc),
      |                                  ^
../../src-master/gcc/dumpfile.c:501:34: warning: spurious trailing space in
format [-Wformat-diag]
  501 |         pp_printf (pp, "%s:%d:%d: ",
      |                                  ^
../../src-master/gcc/dumpfile.c:505:26: warning: spurious trailing space in
format [-Wformat-diag]
  505 |       pp_printf (pp, "%s: ", kind_as_string (dump_kind));
      |                          ^
../../src-master/gcc/dumpfile.c: In member function ??void
dump_context::begin_scope(const char*, const dump_user_location_t&, const
dump_impl_location_t&)??:
../../src-master/gcc/dumpfile.c:1122:20: warning: spurious leading punctuation
sequence ??===?? in format [-Wformat-diag]
 1122 |   pp_printf (&pp, "=== %s ===\n", name);
      |                    ^~~
../../src-master/gcc/dumpfile.c:1122:27: warning: unquoted sequence of 3
consecutive punctuation characters ??===?? in format [-Wformat-diag]
 1122 |   pp_printf (&pp, "=== %s ===\n", name);