thread 41208291 panic: integer overflow
Analyzing empty.zig
      %21 = dbg_stmt(9, 12)
      %22 = ret_err_value_code("Something")
    > %23 = defer_err_code(%2 = %22, {
        %3 = dbg_var_val(%2, "err")
        %4 = dbg_stmt(2, 20)
        %5 = block({
          %6 = dbg_stmt(3, 9)
          %7 = ensure_result_non_error(%2)
          %8 = dbg_stmt(4, 9)
          %9 = unreachable()
        })
        %10 = break_inline(%0, @void_value)
      })
      %24 = dbg_stmt(9, 12)
      %25 = ret_node(%22)
    For full context, use the command
      zig ast-check -t empty.zig

  in empty.zig
    > %19 = condbr(%18, {%21..%25}, {%26})
  in empty.zig
    > %20 = block({%18, %19})

/Users/david/Code/zig/src/Sema.zig:268:37: 0x105d373b7 in putAssumeCapacity (zig)
        map.items[@intFromEnum(key) - @intFromEnum(map.start)] = ref;
                                    ^
/Users/david/Code/zig/src/Sema.zig:1819:38: 0x10587de87 in analyzeBodyInner (zig)
                map.putAssumeCapacity(extra.remapped_err_code, err_code);
                                     ^
/Users/david/Code/zig/src/Sema.zig:917:26: 0x1060fcdbf in analyzeBodyRuntimeBreak (zig)
    sema.analyzeBodyInner(block, body) catch |err| switch (err) {
                         ^
/Users/david/Code/zig/src/Sema.zig:19879:55: 0x105d321cb in zirCondbr (zig)
    const true_hint = try sema.analyzeBodyRuntimeBreak(&sub_block, then_body);