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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/105852] New: ice in instantiate_decl
Date: Sun, 05 Jun 2022 04:49:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105852

            Bug ID: 105852
           Summary: ice in instantiate_decl
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Created attachment 53085
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D53085&action=3Dedit
gzipped C++ source code

For the attached C code, recent gcc does this:

$ /home/dcb/gcc/results.20220528.asan.ubsan/bin/gcc -c -w -O1 bug469.cc
$ /home/dcb/gcc/results.20220604.asan.ubsan/bin/gcc -c -w -O1 bug469.cc
In file included from ../deps/v8/src/handles.h:8,
                 from ../deps/v8/src/builtins.h:9,
                 from ../deps/v8/src/builtins.cc:5:
../deps/v8/include/v8.h:8013:22: internal compiler error: Segmentation fault
0x1091949 crash_signal(int)
        /home/dcb/gcc/working/gcc/../../trunk.git/gcc/toplev.cc:322
0x943705 tree_check(tree_node*, char const*, int, char const*, tree_code)
        ../../trunk.git/gcc/tree.h:3510
0x943705 instantiate_decl(tree_node*, bool, bool)
        /home/dcb/gcc/working/gcc/../../trunk.git/gcc/cp/pt.cc:26483
0x95b8c5 instantiate_pending_templates(int)
        /home/dcb/gcc/working/gcc/../../trunk.git/gcc/cp/pt.cc:26803
$

Seems to be broken again sometime between git hash 919822adc923b00e
and aec868578d851576.

I will have my usual go at reducing the code.=