[Bug analyzer/106845] [13 Regression] ICE in exceeds_p, at analyzer/store.cc:464 since r13-2029-g7e3b45befdbbf1a1

["dmalcolm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106845

--- Comment #2 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Failing assertion here:

#1  0x00000000014df116 in ana::byte_range::exceeds_p (this=0x7fffffffbf80,
other=..., out_overhanging_byte_range=0x7fffffffbfc0)
    at ../../src/gcc/analyzer/store.cc:464
464           gcc_assert (size > 0);


(gdb) list
459         {
460           /* THIS definitely exceeds OTHER.  */
461           byte_offset_t start = MAX (get_start_byte_offset (),
462                                      other.get_next_byte_offset ());
463           byte_offset_t size = get_next_byte_offset () - start;
464           gcc_assert (size > 0);
465           out_overhanging_byte_range->m_start_byte_offset = start;
466           out_overhanging_byte_range->m_size_in_bytes = size;
467           return true;
468         }

where "this" and "other" are both empty, having 0 size:

(gdb) call this->dump()
bytes 1-0
(gdb) call other.dump()
bytes 0--1

due to the cst_capacity_tree in the region_model::check_region_bounds caller is
zero.