[Bug rtl-optimization/100206] aarch64: UB in varasm.c:output_object_block and assembly failure

[acoplan at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100206

--- Comment #1 from Alex Coplan <acoplan at gcc dot gnu.org> ---
Reduced testcase:

const char a;
const char b[] = {
  'a',
  [1234] = 'b',
  [(0x7fffffffffffffffL - 1)] = '\0'
};