[Bug c++/96638] New: [10/11 Regression] ICE in chainon, at tree.c:3169

[Bug c++/96638] New: [10/11 Regression] ICE in chainon, at tree.c:3169

[haoxintu at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

            Bug ID: 96638
           Summary: [10/11 Regression] ICE in chainon, at tree.c:3169
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: error-recovery, ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: haoxintu at gmail dot com
  Target Milestone: ---

Input:
//small.cc
void foo(int[] alignas[1] alignas()){}

Command:
g++ small.cc

Output:
small.cc:1:23: error: expected ‘(’ before ‘[’ token
    1 | void foo(int[] alignas[1] alignas()){}
      |                       ^
      |                       (
small.cc:1:35: error: expected primary-expression before ‘)’ token
    1 | void foo(int[] alignas[1] alignas()){}
      |                                   ^
small.cc:1:38: internal compiler error: in chainon, at tree.c:3169
    1 | void foo(int[] alignas[1] alignas()){}
      |                                      ^
0x7ea11e chainon(tree_node*, tree_node*)
        ../../gcc/tree.c:3169
0x7ea11e chainon(tree_node*, tree_node*)
        ../../gcc/tree.c:3152
0x93ad08 grokdeclarator(cp_declarator const*, cp_decl_specifier_seq*,
decl_context, int, tree_node**)
        ../../gcc/cp/decl.c:12060
0x9f275e cp_parser_parameter_declaration_list
        ../../gcc/cp/parser.c:22705
0x9f2b21 cp_parser_parameter_declaration_clause
        ../../gcc/cp/parser.c:22622
0x9df4f1 cp_parser_direct_declarator
        ../../gcc/cp/parser.c:21299
0x9df4f1 cp_parser_declarator
        ../../gcc/cp/parser.c:21163
0x9f4756 cp_parser_init_declarator
        ../../gcc/cp/parser.c:20663
0x9d4f7c cp_parser_simple_declaration
        ../../gcc/cp/parser.c:13811
0xa002fe cp_parser_declaration
        ../../gcc/cp/parser.c:13510
0xa009db cp_parser_translation_unit
        ../../gcc/cp/parser.c:4793
0xa009db c_parse_file()
        ../../gcc/cp/parser.c:44095
0xb1b9fd c_common_parse_file()
        ../../gcc/c-family/c-opts.c:1188
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

This only occurs in GCC-trunk, GCC-10 performs well in error-recovery.

[Bug c++/96638] [8/9/10/11 Regression] ICE in chainon, at tree.c:3169

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[10/11 Regression] ICE in   |[8/9/10/11 Regression] ICE
                   |chainon, at tree.c:3169     |in chainon, at tree.c:3169
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Target Milestone|---                         |8.5
           Priority|P3                          |P4
                 CC|                            |mpolacek at gcc dot gnu.org
   Last reconfirmed|                            |2020-08-18

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Even GCC 6 ICEs.

[Bug c++/96638] [9/10/11/12 Regression] ICE in chainon, at tree.c:3169

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|8.5                         |9.4

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 8 branch is being closed.

[Bug c++/96638] [9/10/11/12 Regression] ICE in chainon, at tree.c:3169

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|9.4                         |9.5

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9.4 is being released, retargeting bugs to GCC 9.5.

[Bug c++/96638] [9/10/11/12 Regression] ICE in chainon, at tree.c:3169

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Marek Polacek from comment #1)
> Even GCC 6 ICEs.

I suspect GCC 5 did not ICE, see PR 96637 .

[Bug c++/96638] [10/11/12/13 Regression] ICE in chainon, at tree.c:3169

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|9.5                         |10.4

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed

[Bug c++/96638] [10/11/12/13 Regression] ICE in chainon, at tree.c:3169

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.4                        |10.5

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.

[Bug c++/96638] [10/11/12/13/14 Regression] ICE in chainon, at tree.c:3169

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |needs-bisection

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I can't reproduce this on the trunk, I wonder when this was fixed.

[Bug c++/96638] [10/11/12/13/14 Regression] ICE in chainon, at tree.c:3169

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96638

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 96637 in the end.

*** This bug has been marked as a duplicate of bug 96637 ***