[Bug c++/120076] New: statement expression allows bypassing own initializer

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120076

            Bug ID: 120076
           Summary: statement expression allows bypassing own initializer
           Product: gcc
           Version: 16.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid, stmt-expr
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Examples:
```
void f(void) {
 for (int i=({ goto ouch; int x = 10; x;});i<0;++i)
ouch:
  ;
}
void g(void) {
  int i1 = ({ 
    goto ouch;  
    12;
  });
ouch:
  ;
}
```

GCC does have code to check for bypassing initializations when jumping out of a
statement expression, just it does not catch if the statement expression is
being used to initialize a variable.