[Bug rtl-optimization/116780] [lra][avr] internal compiler error: output_operand: address operand requires constraint for X, Y, or Z register

[denisc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116780

--- Comment #2 from denisc at gcc dot gnu.org ---
Comment on attachment 59393
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=59393
Simplified testcase

void
f ()
{
  volatile char c[0];
  c[0] = 0;
}