[Bug c/82134] warn_unused_result triggers on empty structs even when they are used

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82134

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |mpolacek at gcc dot gnu.org

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
The problem with `if (0) { /* don't warn about stuff in here */ }` is that you
can jump into that block from elsewhere:

if (0)
  {
L:
    // ...
  }

so it's not as easy as it might seem.