[Bug c++/94588] Improve redeclared parameter name diagnostic

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94588

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
...nor in the outermost block of any handler associated with a
function-try-block:

void
g (int i)
  try
    {
    }
  catch (...)
    {
      int i;
    }