[Bug c/87038] diagnostics: Please add warning for jumping over initializers with switch/case in C mode

[steinar+gcc at gunderson dot no]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87038

--- Comment #16 from Steinar H. Gunderson <steinar+gcc at gunderson dot no> ---
Since you're asking (presumably rhethorically): I would certainly recommend
that this code be changed, yes, and I don't find the author's intent obvious at
all. The fix that comes to mind is to scope the case clause:

  void f4(int a) {
    switch (a) { 
      case 0: {
        int i = f1();
        f3(i);
        break;
      }
      case 1: {
        int i = f2();
        f3(i);
        break;
      }
    }
  }