[Bug c/101109] New: ICE: Segmentation Fault: tree_check(tree_node*, char const*, int, char const*, tree_code)

["cnsun at uwaterloo dot ca" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101109

            Bug ID: 101109
           Summary: ICE: Segmentation Fault: tree_check(tree_node*, char
                    const*, int, char const*, tree_code)
           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.fE7wx4xftU-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 20210617 (experimental) [master revision
:7d4a310d9:9a61dfdb5ecb58bc4caea1c11e017d93bdd1d9a5] (GCC)

$ cat mutant.c
__attribute__((section(".vtable_map_vars"))) f3() {}

$ gcc-trunk  mutant.c
mutant.c:1:46: warning: return type defaults to ‘int’ [-Wimplicit-int]
    1 | __attribute__((section(".vtable_map_vars"))) f3() {}
      |                                              ^~
during RTL pass: final
mutant.c: In function ‘f3’:
mutant.c:1:52: internal compiler error: Segmentation fault
    1 | __attribute__((section(".vtable_map_vars"))) f3() {}
      |                                                    ^
0xf0b603 crash_signal
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/toplev.c:327
0x1263b09 tree_check(tree_node*, char const*, int, char const*, tree_code)
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/tree.h:3370
0x1263b09 default_elf_asm_named_section(char const*, unsigned int, tree_node*)
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/varasm.c:6908
0x1265e25 switch_to_section(section*, tree_node*)
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/varasm.c:7832
0x127227d assemble_start_function(tree_node*, char const*)
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/varasm.c:1915
0xb90253 rest_of_handle_final
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/final.c:4281
0xb90253 execute
        /tmp/tmp.fE7wx4xftU-gcc-builder/gcc/gcc/final.c:4363
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.