[Bug c/100625] New: ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[Bug c/100625] New: ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[cnsun at uwaterloo dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

            Bug ID: 100625
           Summary: ICE on gimple program: Segmentation fault,
                    contains_struct_check(tree_node*,
                    tree_node_structure_enum, char const*, int, char
                    const*)
           Product: gcc
           Version: tree-ssa
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: cnsun at uwaterloo dot ca
  Target Milestone: ---

$ gcc-trunk -v
Using built-in specs.
COLLECT_GCC=gcc-trunk
COLLECT_LTO_WRAPPER=/scratch/software/gcc-trunk/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/configure
--enable-languages=c,c++,lto --enable-checking-yes --enable-multiarch
--prefix=/scratch/software/gcc-trunk --disable-bootstrap
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 12.0.0 20210514 (experimental) [master revision
:e5c3c8afa:f3b1516d9dfd969d7cc1ca6f26dec13478a1c458] (GCC)

$ cat mutant.c
__GIMPLE
foo() {
bb1:
bb1:;
}

$ gcc-trunk -fgimple mutant.c
mutant.c:2:1: warning: return type defaults to ‘int’ [-Wimplicit-int]
    2 | foo() {
      | ^~~
mutant.c: In function ‘foo’:
mutant.c:4:1: error: duplicate label ‘bb1’
    4 | bb1:;
      | ^~~
mutant.c:3:1: note: previous definition of ‘bb1’ with type ‘void’
    3 | bb1:
      | ^~~
during GIMPLE pass: cfg
mutant.c:2:1: internal compiler error: Segmentation fault
    2 | foo() {
      | ^~~
0xef83e3 crash_signal
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/toplev.c:327
0xf38755 contains_struct_check(tree_node*, tree_node_structure_enum, char
const*, int, char const*)
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree.h:3469
0xf38755 stmt_starts_bb_p
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:2784
0xf38755 make_blocks_1
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:552
0xf44fd6 make_blocks
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:661
0xf44fd6 build_gimple_cfg
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:226
0xf44fd6 execute_build_cfg
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:370
0xf44fd6 execute
        /tmp/tmp.eZIsobWkq2-gcc-builder/gcc/gcc/tree-cfg.c:409
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.

[Bug c/100625] ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot gnu.org
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2021-05-17

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I have a patch.

[Bug c/100625] ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Richard Biener <rguenth@gcc.gnu.org>:

https://gcc.gnu.org/g:086882b1c8faa8f99f98a9219ccec42d89db50c2

commit r12-839-g086882b1c8faa8f99f98a9219ccec42d89db50c2
Author: Richard Biener <rguenther@suse.de>
Date:   Mon May 17 14:47:08 2021 +0200

    c/100625 - avoid building invalid labels in the GIMPLE FE

    When duplicate labes are diagnosed, avoid building a GIMPLE_LABEL.

    2021-05-17  Richard Biener  <rguenther@suse.de>

            PR c/100625
    gcc/c/
            * gimple-parser.c (c_parser_gimple_label): Avoid building
            a GIMPLE label with NULL label decl.

    gcc/testsuite/
            * gcc.dg/gimplefe-error-9.c: New testcase.

[Bug c/100625] ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.

[Bug c/100625] ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |12.0

[Bug c/100625] ICE on gimple program: Segmentation fault, contains_struct_check(tree_node*, tree_node_structure_enum, char const*, int, char const*)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100625

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
*** Bug 100505 has been marked as a duplicate of this bug. ***