[Bug c/105972] New: [12/13 Regression] ICE in lower_stmt, at gimple-low.cc:312

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105972

            Bug ID: 105972
           Summary: [12/13 Regression] ICE in lower_stmt, at
                    gimple-low.cc:312
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

Started between 20211017 and 20211024 :
(gcc configured with --enable-checking=yes)


$ cat z1.c
__attribute__((optimize(0)))
int f ()
{
  int g ()
}


$ gcc-13-20220612 -c z1.c -g -O2
z1.c: In function 'g':
z1.c:5:1: error: expected declaration specifiers before '}' token
    5 | }
      | ^
z1.c:6: error: expected '{' at end of input
z1.c: In function 'f':
z1.c:5:1: error: expected declaration or statement at end of input
    5 | }
      | ^
during GIMPLE pass: lower
z1.c:2:5: internal compiler error: in lower_stmt, at gimple-low.cc:312
    2 | int f ()
      |     ^
0x1c2901d lower_stmt
        ../../gcc/gimple-low.cc:312
0x1c2901d lower_sequence
        ../../gcc/gimple-low.cc:217
0x1c27d79 lower_gimple_bind
        ../../gcc/gimple-low.cc:475
0x1c291a8 lower_function_body
        ../../gcc/gimple-low.cc:110
0x1c291a8 execute
        ../../gcc/gimple-low.cc:195