[Bug c++/79937] [6/7/8 Regression] ICE in replace_placeholders_r

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79937

--- Comment #18 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
struct Y
{
  static Y bar (Y y) { return y; }
  int i;
  int n = bar (Y{2,i}).m + bar {Y{2,i,i}).n;
  int m = i;
};

is rejected, so I can't find a counter-example where PLACEHOLDER_EXPRs for
different objects would be intermixed in the same CONSTRUCTOR (assuming there
must be a CONSTRUCTOR).